Must-do activities at every national park

- Location: Washington
- Recreational visits in 2021: 17,855

The top of Desolation Peak provides beautiful views of the North Cascades range, which contains one-third of all the glaciers on the mainland United States within its 789 square miles. The peak offers literature fans an added thrill, as writer Jack Kerouac spent a summer inside the fire tower at the top while serving as a fire lookout. Summer is the best time to visit the park since snow closes down many of the access roads from October through June.

- Location: Alaska
- Recreational visits in 2021: 18,278

Lake Clark offers plenty for the outdoor adventure seeker, from kayaking and fishing on the 50-mile lake to hiking and sightseeing on the 4 million, mostly unexplored acres. The shores of nearby Upper Twin Lake are host to Proenneke Cabin, built in 1968 by Richard Proenneke using resources from the area and tools he made himself. Getting there can be tricky, with no roads leading to Lake Clark, so an air taxi and water landing on the lake are the best routes for getting there in the summer when the cabin is open for tours.

- Location: Alaska
- Recreational visits in 2021: 24,764

Katmai National Park is located on the Southern Peninsula of Alaska and is home to more brown bears than people, an estimated 2,200. The best spot to view them is from Brooks Camp, which features multiple viewing platforms to watch them feed on salmon in the Brooks River. June through mid-September is the best time to visit since these hibernators hunker down for the winter, and the camp closes down for most visitors.

- Location: Michigan
- Recreational visits in 2021: 25,844

On Lake Superior between Michigan and Minnesota, Isle Royale's frigid depths preserve the remains of 10 notable shipwrecks ready for exploration by licensed divers. Ranging in depth from 2 to 260 feet, the oldest ship dates back to 1877, when the island was teeming with copper mines. Anyone without scuba training can still find something to do on Isle Royale, including exploring those old copper mines, seeing the Rock Harbor Lighthouse, which dates back to 1855, and seeing the Northern Lights.

- Location: Alaska
- Recreational visits in 2021: 50,189

Measuring more than 13 million acres, Wrangell-St Elias in south-central Alaska is the largest designated wilderness in America. Access to much of the park is incredibly tricky, including its most extensive collection of peaks above 16,000 feet in North America, led by Mount Saint Elias, the second largest mountain in the U.S. For more adventurous types, sightseeing tours can end with a wilderness drop-off for backpacking through the mostly unexplored terrain.

- Location: Florida
- Recreational visits in 2021: 83,817

The Florida Keys offer great opportunities for sun and fun—and a little bit of history at Fort Jefferson, the largest brick building in the Western hemisphere. The fort served as a prison during the Civil War, requiring over 16 million bricks to complete, with many shipped from Maine. Guided snorkeling tours of the fort's underwater ruins provide colorful fish and reefs, and encounters with wildlife like sea turtles, from which the island draws its name.

- Location: Alaska
- Recreational visits in 2021: 89,768

There are several activities at Glacier Bay, from hiking trails to flightseeing, but taking a boat tour is the most personal way to see all that the park's 3.3 million acres have to offer. Passengers can see massive ice chunks calve from Margerie Glacier or icebergs exploding to the surface as they break off the base of Johns Hopkins, spotting wildlife from whales and sea lions to grizzly bears and moose along the way. Dressing in layers is recommended for boat tours, which run every morning from mid-May through mid-September since the park closes for the winter.

- Location: Nevada
- Recreational visits in 2021: 144,875

The 5-mile hike through the Bristlecone and Glacier Trail leads to the base of Wheeler Peak and Nevada's only glacier. Along the way, hikers can walk through the Bristlecone Pines, one of the oldest living organisms on Earth. Great Basin offers several experiences unique to its borders, including tours of the Lehman Caves, which offers over 300 shield formations in its explorable depths. The park is open year-round, but some areas close during the winter months.

- Location: South Carolina
- Recreational visits in 2021: 215,181

For a two- to three-week period between mid-May and mid-June, the night sky in Congaree National Park lights up for the Fireflies Festival. Visitors descend upon Congaree to see the millions of synchronous fireflies illuminate in perfect unison just feet off the ground during mating season. Although there are several restrictions during the famous festival, the park is open late, and nearby Columbia offers plenty of places to stay.

- Location: Alaska
- Recreational visits in 2021: 229,521

The spectacle of North America's most significant peak, Denali (formerly Mount McKinley), is a close second, but wildlife is the main attraction in the 6 million-acre park. There are 39 species of mammals to check out at Denali, but the Big Five—moose, caribou, Dall sheep, wolves, and grizzly bears—are the holy grail. The best way to see Denali is by bus tour in the summertime since there's only one road through, and winter weather is especially unpredictable.

- Location: Minnesota
- Recreational visits in 2021: 243,042

The only national park in Minnesota, Voyageurs is a system of lake waterways that requires a boat most of the year to see its vast beauty. Fishing in the waters of the Rainy Lake Basin yields some of the best walleye and bass populations in the country. The park is open year-round, but trade in the boat for a snowmobile during the winter months.

- Location: Texas
- Recreational visits in 2021: 243,291

Guadalupe Mountains National Park offers over 80 miles of hiking trails deep in the Chihuahuan Desert of West Texas. Devil's Hall Trail, featuring a natural rock staircase, and Guadalupe Peak, dubbed the "Top of Texas," present two good day-hiking options. Visitors to the park should come well prepared, since the nearest gas station is 35 miles away, and the park has no store and no cell service.

- Location: Colorado
- Recreational visits in 2021: 308,910

The South Rim at the Black Canyon of the Gunnison offers a dozen different spots, including Chasm View, Painted Wall, Pulpit Rock, and Sunset View—a walk right to the edge of the sheer, 2,000-foot walls of the canyon. July is the busiest time at the South Rim, but only a few hour-drive away is the more scenic North Rim. Just 1,200 people visit at the busiest times, and the weather makes the rims inaccessible by car from November to April.

- Location: California
- Recreational visits in 2021: 319,252

Painted Cave on Santa Cruz Island is one of the largest sea caves in the world, cutting a quarter-mile into the island and providing amazing views. Getting to Santa Cruz Island by charter will also allow visitors to do some whale watching, snorkel the kelp forest, and see plenty of marine wildlife all in a single visit to the Channel Islands.

- Location: Caribbean
- Recreational visits in 2021: 323,999

It's tough to see Virgin Islands National Park without a pair of swim trunks, as over 40% of the park is underwater. Crystal-clear water and a variety of colorful reefs and wildlife make the seas a prime spot for snorkelers and scuba divers. For snorkelers, Hawksnest Bay boasts one of the most extensive stands of Elkhorn coral, while Cinnamon Bay Beach offers a submerged historic village and a sunken plane to explore. Congo Cay presents a chance to dive a little deeper, dropping off into the open ocean, and see more abundant wildlife such as rays.

- Location: California
- Recreational visits in 2021: 348,857

One of the smallest and youngest national parks, Pinnacles offers a variety of places for birdwatching and hiking. High Peaks is the prime spot to see the pinnacle of birdwatching in the park. Visitors can enjoy the birds year-round.

- Location: New Mexico
- Recreational visits in 2021: 349,244

The largest single cave chamber in North America, the Big Room at Carlsbad Caverns, was once dubbed "The Grand Canyon with a roof" by Will Rogers. Visitors can take an elevator or walk the winding mile-plus Natural Entrance Trail down to the massive limestone enclosure, where multiple trails await. The best time to visit the park is at sunset from late May through October, when hundreds of thousands of Brazilian free-tailed bats leave the caves to hunt. The park offers an amphitheater to watch the flight, but you will have to take mental pictures as cellphones and cameras can disrupt the bats' behavior.

- Location: California
- Recreational visits in 2021: 359,635

While Bumpass Hell Trail may be the feature attraction at Lassen, Boiling Springs Lake is worth a trip in and of itself. A short walk through meadows and fields leads to the 125-degree lake, with some of the park's best mudpots at the outskirts. Make sure you stay on the trails: stepping off could result in a dip in acid water.

- Location: Alaska
- Recreational visits in 2021: 411,782

Taking in the sights from aboard a tour boat is the best way to experience all that Kenai Fjords has to offer. Float to the base of a few of the park's 40 glaciers and spot a variety of marine wildlife, including sea otters, seals, and a variety of whale species. Summer is the best time to visit when the days are longer, and roads can remain open—and don't fret if it rains since it creates ephemeral waterfalls off the glacier.

- Location: California
- Recreational visits in 2021: 435,879

A scenic drive through Redwood reveals ancient forests, a rugged coastline, upland prairies, and oak woodlands. When not driving, visitors are encouraged to walk through the Redwood forest for half-day and full-day excursions. At the end of the day, backcountry camping gives visitors the full Redwood experience of sleeping under 240-foot trees.

- Location: Kentucky
- Recreational visits in 2021: 515,774

Mammoth Cave is the most extensive known cave system in the world, at over 400 explored miles, and all the history and beauty can be overwhelming without a guide. From simple tours like the Frozen Niagara Tour to the steep inclines and stairs of the Historic Tour, Mammoth has something for the history or adventure buff inside. Mammoth Cave is open year-round, but tours can vary from season to season.

- Location: Colorado
- Recreational visits in 2021: 548,477

The Pueblo called Mesa Verde home from 600 to 1300 A.D., constructing elaborate buildings and dwellings among the cliffs of Colorado. Long House is the second largest of Mesa Verde's 600 cave dwellings and the best chance to get up close and personal with the history of the Pueblo. The only way to see Long House is via a ranger-led tour, and you have to buy a ticket for the two-hour tour before making the 45-minute drive out to Wetherill Mesa. The park itself is open year-round but provides tours only in-season.

- Location: California
- Recreational visits in 2021: 562,918

The second largest tree in the world, called General Grant, can be seen at this park. It extends 268 feet into the sky and reaches 34 feet in diameter. It's less than a half-mile walk down a paved trail to see General Grant. The park is open 24 hours a day all year and operates with nearby Sequoia National Park, where General Sherman, the largest tree in the world, lives, making it possible to hit both in one day.

- Location: Texas
- Recreational visits in 2021: 581,220

A soak in the Langford Hot Springs is the perfect way to end a day of hiking inside Texas' Big Bend National Park, exploring popular spots like Santa Elena Canyon, once called the Grand Canyon of Texas. J.O. Langford built a limestone bathhouse in the early 1900s after hearing of the healing powers of the 105-degree springs on the banks of the Rio Grande. The springs are a short quarter-mile hike from the trailhead on the southeastern part of the park, so after a full day of hiking, relief is a short walk away.

- Location: Arizona
- Recreational visits in 2021: 590,334

In the northern section of Petrified Forest lies the Painted Desert, 100 miles of multicolored badlands that stretch through the Navajo Nation to Grand Canyon National Park. A little preparation is required to camp beneath the dark skies, like obtaining a free backcountry permit, but once you get off the half-mile trail leading into the desert, you're free to roam and camp anywhere. You can check out the old Studebaker on Route 66 on your way in, too.

- Location: Colorado
- Recreational visits in 2021: 602,613

Flying down a mountain in Colorado isn't a unique experience, but doing it on the sands of Great Sand Dunes National Park certainly is. The park has a lot to offer, including climbing North America's tallest dune, but sandboarding and sledding are the unique activities at the park. The park is open year-round, but spring and fall are the best times to carve some sand since it can reach 150 degrees during summer days. Special equipment is needed as well, which you can rent at a couple locations outside the park entrance.

- Location: Oregon
- Recreational visits in 2021: 647,751

Crater Lake itself is the featured attraction in Oregon's Cascade Mountains, and the 33-mile Scenic Rim Drive is the best way to see the nation's deepest lake. The park is open year-round, but the roads around the rim close from late October through early April. The trail is narrow but offers a bunch of spots to jump out and take pictures. Boat and trolley tours are available if you want to skip the driving.

- Location: Florida
- Recreational visits in 2021: 705,655

Get out the snorkel and scuba gear for a trip to Biscayne National Park, aka Watery Wonderland. Sunken ships are just a few underwater sites for visitors. For those who prefer to stay above water, boating, canoeing, kayaking, fishing, lobstering, and watching wildlife are other activities to enjoy. Children have the option to be a Junior Ranger by visiting three mascots including Peter the Panther, Diego the Dolphin, and Aleesha the Alligator at three of South Florida's national parks, including Big Cypress and the Everglades.

- Location: South Dakota
- Recreational visits in 2021: 709,001

Wind Cave features the world's highest concentration of boxwork formations, a structure of honeycomb-patterned calcite protruding from the cave walls. The best way to view this rare geologic sight is the Natural Entrance Tour, beginning at the cave's only known natural opening, which the Lakota consider sacred as the place their ancestors first emerged from the Earth. The park is open year-round and offers plenty of hiking trails, wildlife, and camping opportunities for anyone that doesn't want to venture beneath the Earth.

- Location: New Mexico
- Recreational visits in 2021: 782,469

Southern New Mexico's White Sands National Park offers 275 square miles of sparkling sand dunes positioned in the middle of the Chihuahuan Desert's Tularosa Basin. White Sands was a national monument until its status was upgraded in December 2019 to a national park. Dune Trails is a network of trails that are appropriate for all abilities, from the accessible half-mile Interdune Boardwalk to the black diamond-rated Alkali Flat Trail, which takes three hours to finish. 

- Location: North Dakota
- Recreational visits in 2021: 796,085

Two different scenic routes put all the Badlands offer on display, with frequent scenic overlooks and tons of wildlife, from bison to snakes. Theodore Roosevelt was called the Conservationist President—protecting over 230 million acres during his presidency—and visiting Maltese Cross Cabin gives visitors a look into the past. The best time to visit is May through September to avoid the snow, though the park is open year-round.

- Location: Hawaii
- Recreational visits in 2021: 853,181

The drive to the top of Haleakala will take you through as many ecological zones as a trip from Mexico to Canada, featuring more endangered species than any other national park. Seeing a sunrise or sunset from the peak of Haleakala, or "House of the Sun," draws nearly half the visitors to the park annually. Check the weather before you go and make sure you have reservations for sunrise (none needed for sunset).

- Location: Utah
- Recreational visits in 2021: 911,594

The views at Canyonlands begin as soon as you get to the visitors center in southeastern Utah, and there are plenty of scenic drives to satisfy the inner sightseer. Sunrise is the best time to visit and photograph Canyonlands' feature attraction, Mesa Arch, which is just a half-mile walk down the Mesa Arch Trail. The Island in the Sky section of the park, which contains Mesa Arch, is open year-round, with shorter winter hours. If you have a few days (and some survival skills), a trip out to the remote Maze area offers solitude and serenity.

- Location: Florida
- Recreational visits in 2021: 942,130

There are plenty of ways to get an up-close look at one of the thousands of alligators in Everglades National Park, the third largest park in the lower 48 states. The 15-mile road to the Shark Valley Visitors Center can be done by tram, bike, or foot, and alligators can be spotted sunbathing along the asphalt trail. For more daring types, several alligator farm shows offer feeding giant reptiles that can reach 15 feet. The dry season of December to April is the most popular time to visit since temperatures and humidity are low, but the wet season offers more alligator activity.

- Location: California
- Recreational visits in 2021: 1,059,548

Measuring in at 275 feet tall with a 36-foot diameter at the base, General Sherman is the world's largest tree by volume. General Sherman is the main attraction inside Sequoia's largest sequoia grove, the Giant Forest, and is reached with just a half-mile walk down a paved trail. On your way to the Giant Forest, drive up Crescent Meadow Road and you will pass through the tunnel log caused by a great sequoia falling across the road in 1937.

- Location: Arizona
- Recreational visits in 2021: 1,079,786

Hiking the trails provides a great view of the mighty saguaros, the largest cacti in the country, growing up to 50 feet tall. Saguaro National Park is divided into two districts, separated by the city of Tucson, but both spots have trails with varying degrees of difficulty and are open year-round. If you can stand the heat, visiting from late April through June offers a chance to see the saguaros' flowers in full bloom.

- Location: Missouri
- Recreational visits in 2021: 1,145,081

Renamed Gateway Arch after being the "Jefferson National Expansion Memorial," this Missouri region known for its 630-foot monument—which visitors flock to annually for the famous site—is now national parkland. Two popular visitor spots include the Museum of Westward Expansion and the St. Louis Courthouse. Riding on a St. Louis Riverfront Cruise, taking a tram ride to the top of the arch, or hovering over the site in a helicopter are also activities at the park.

- Location: California, Nevada
- Recreational visits in 2021: 1,146,551

The giant Badwater Basin salt flat, the largest at America's lowest level of minus-282 feet, is a must-see at Death Valley, with the National Park Service reporting, "These large salt formations, in the shape of a large polygon, form a unique landscape that appears to stretch on forever." Other activities include listening to underground pops and pings at Devils Golf Course, and visiting Zabriskie Point, considered one of the most famous sights in Death Valley.

- Location: South Dakota
- Recreational visits in 2021: 1,224,226

Large, multicolored rock formations are the premier attraction within the 244,000 acres that make up the Badlands. The Notch Trail is the best way to step right to the edge of the cliffs and see all that the White River Valley offers. People with a fear of heights should avoid the 1.5-mile trail, which includes climbing a log ladder to reach the Notch. Avoid the rain as well, since roads can become impassable, and trails slippery.

- Location: Hawaii
- Recreational visits in 2021: 1,262,747

Hawaii's Volcanoes National Park centers on a pair of active volcanoes, Mauna Loa and Kilauea. While the Crater Rim Drive sustained serious damage when Kilauea erupted in 2018, much of it is open again and gives an up-close look at the steam vents and lava that make up most of the island. The park is open 365 days a year, but monitor the weather before you go.

- Location: Utah
- Recreational visits in 2021: 1,405,353

It's difficult to get to the spot where outlaw Butch Cassidy hid out in the hills of southern Utah's Capitol Reef National Park, but the hike is worth it. Stop by Fruita Ranch or Gifford Homestead on the way to Cassidy's Arch and get a glimpse into the lifestyle of the area's first settlers. Check harvest schedules to visit one orchard and eat fruit straight from the trees.

- Location: Virginia
- Recreational visits in 2021: 1,592,312

It's a slow drive along the 105-mile Skyline Drive, Shenandoah's only public road, with 70 lookouts to see the majesty of the Blue Ridge Mountains. Fall is the best time to take the three-hour drive, after the leaves have changed, but pay attention to the weather because snow can close the road rapidly. Winter visits are still worth the trip and increase the chances of seeing some of the area's diverse wildlife.

- Location: Washington
- Recreational visits in 2021: 1,670,063

A trip to Mount Rainier in early August is the prime time to see the vast wildflower fields of Paradise in full bloom. Multiple trails lead straight into the lush fields of pink, purple, red, and white wildflowers at the base of Mount Rainier. For winter buffs, the area experiences huge amounts of snow every winter, perfect for skiing, sledding, or snowshoeing.

- Location: West Virginia
- Recreational visits in 2021: 1,682,720

One of North America's oldest rivers, the New River runs through a park with more than 70,000 acres. The New River runs for 53 miles—it starts at Bluestone Dam and finishes at Hawks Nest Lake. Experience the river's whitewater, which ranges from easy to Class III, with guided rafting tours from various licensed companies in the area. 

- Location: Utah
- Recreational visits in 2021: 1,806,865

Arches National Park is a great spot to take the family, with several easy hikes and breathtaking views. The Windows Section gives visitors the opportunity to view beautiful red-rock arches all within a half-mile walk. The park is most popular during the winter since the temperature exceeds 100 regularly in the summer.

- Location: Utah
- Recreational visits in 2021: 2,104,600

The Bryce Point scenery draws visitors to the Utah park. But it's not just Bryce Point that visitors often frequent; they also praise positively named points including Inspiration, Sunrise, and Rainbow. Even the visitor center is a must-see, as the prairie dog maze and interactive consoles offer incredible experiences.

- Location: Arkansas
- Recreational visits in 2021: 2,162,884

There are 26 miles of trails through Hot Springs National Park to explore, but sitting down afterward for a thermal bath along Bathhouse Row is the way to go. The springs are noted for their healing and therapeutic benefits, and there are eight bathhouses to choose from, including Buckstaff, which has been operating since 1912. When the day is done, sit back at the first brewery in a national park, Superior Bathhouse Brewery, and enjoy a beer made from the thermal spring water.

- Location: Ohio
- Recreational visits in 2021: 2,575,275

Great blue herons are just one of the magnificent birds visitors can see in the Beaver Marsh. They are regularly seen in the area, and some visitors even see their young. There are several more activities to participate in at Cuyahoga Valley, including hiking the Virginia Kendall Ledges, riding the Cuyahoga Valley Scenic Railroad, biking along the Towpath Trail, taking in Brandywine Falls, and camping at the Stanford Trail campground.

- Location: Washington
- Recreational visits in 2021: 2,718,925

Tidepooling is one of the top things to do at Olympic National Park in Washington, with reviews reporting Rialto and Second Beach as the best spots to explore underwater wildlife. Roaming through the Hoh Rain Forest is also a must-do activity, along with Hurricane Ridge, which can be hiked in the summer and accessed by sled in the winter.

- Location: California
- Recreational visits in 2021: 3,064,400

There are many must-do activities at Joshua Tree, such as the Indian Cove Nature Trail, rock climbing at Echo Cove, or hiking among hulking boulders on the Arch Rock Trail. Eight developed campgrounds offer overnight excursions, with most visitors frequenting Joshua Tree during the week from October through May, and on the weekends from mid-February to mid-May. Of course, checking out the park's namesake trees in the Colorado and Mojave Deserts is one of the first things any visitor does when visiting the grounds.

- Location: Montana
- Recreational visits in 2021: 3,081,656

The National Park Service says "a quintessential part of any Glacier visit" is touring Going-to-the-Sun Road. When you get out of the car from the scenic drive between the east and west sides of the mountain, hiking the Highline Trail and photographing the Grinnell Glacier is a must-do activity and offers a look at a variety of wildlife, including mountain goats, bears, marmots, and bighorn sheep.

- Location: Indiana
- Recreational visits in 2021: 3,177,210

Writing for National Geographic, Jacqueline Kehoe notes, "Fifteen miles of beaches give way not only to impressive sand dunes and blowouts, but marshes, wetlands, groves of black oak savanna and maple sugar trees, and fields of wildflowers that come and go with the seasons." Geocaching, the world's largest treasure hunt, is one of the unique visitor experiences at the national park, as well as Dark Sky parties, fun-filled nights of constellation study, and the annual Indiana Dunes Bird Watching Festival every May.

- Location: California
- Recreational visits in 2021: 3,287,595

Calling Yosemite "a shrine to human foresight" made up of glaciers and granite, the National Park Service says the best time to visit the High Sierra is April through October. Seeing the many viewpoints of Half Dome, an 8,800-foot mountain, encompasses all the best things to do at the California park. If not ice skating under or hiking up Half Dome, visitors can also experience it while rafting or tubing down the Merced River.

- Location: Wyoming
- Recreational visits in 2021: 3,885,230

Two prime spots to visit at Grand Teton are the scenic mountain valley of Jackson Hole and Jenny Lake, a 2-mile long, 250-foot deep basin and 7.5-mile trail that leads to falls or canyons. Other must-do activities according to the National Park Service include cross-country skiing and snowshoeing in the winter and backcountry camping in the summer, which requires advanced planning. Another must-do is hiking any of Grand Teton's 12 top-rated trails, which range from arduous and lengthy to aligned and short.

- Location: Maine
- Recreational visits in 2021: 4,069,098

Acadia National Park includes Mount Desert Island, the most massive island off the Maine Coast in the town of Bar Harbor. Some must-do activities in the area include soaking up the scenery while walking the shore path or cruising on the Queen Mary. From March to October, whale watching is widespread, according to Sally Barber of USA Today, who calls the 36,000-square-mile gulf "one of the planet's most productive aqua ecosystems." The Maine park launched the Artists-in-Residence experience to attract new visitors—particularly artists who can express the beauty of the land through their respective creative mediums.

- Location: Colorado
- Recreational visits in 2021: 4,434,848

The Colorado national park sees many visitors walking along the five-state-long, 3,100-mile Continental Trail Divide. While visitors can enjoy the 6-mile hike into the ghost town Lulu City, an abandoned mining village notorious for apparitions, all year, they can also spend a long weekend in Colorado at the Rocky Mountain National Park Night Sky, a three-day event held every summer.

- Location: Arizona
- Recreational visits in 2021: 4,532,677

The grandest sections of the Grand Canyon include the North Rim and Bright Angel Trail, both of which recommend setting aside a half or full day to visit. For serious visitors, the Grand Canyon offers a Ranger Program, with walks and talks during the year on the North and South Rim. But the most popular part of the park is the Grand Canyon Village, the entryway to the ravine and location of Yavapai Point.

- Location: Wyoming, Montana, Idaho
- Recreational visits in 2021: 4,860,242

Old Faithful—a predictable cone geyser that has spewed every 44 to 125 minutes for decades—is one of the most magnificent offerings of the park. But there's more to do at Yellowstone, including hiking to the Yellowstone Grand Canyon that tops the hot water springs. Another incredible spot is Yellowstone Lake, the largest freshwater lake in the park where panoramic views are most visible by car.

- Location: Utah
- Recreational visits in 2021: 5,039,835

The Travel Channel's Erin Gifford reports that aside from hiking Angels Landing, running the Zion Half Marathon is one of the best things you can do in the national park. When not in the sky touring the mountain from a helicopter, visitors can look up to the sky when stargazing, both very popular park activities. Rock climbing, scenic roadway tours, off-roading, and watching a sunrise or sunset in the canyons are considered "must-do" activities at Zion.

- Location: Tennessee, North Carolina
- Recreational visits in 2021: 14,161,548

With a small section of the Appalachian Trail running through it, the Great Smoky Mountains touts towering mountains with cliff-side walkways perfect during all four seasons. Considered the most popular spot in the park by the National Park Service, Cades Cove promises many wildlife sightings including black bears, coyotes, and turkeys. While many walk and bike the 11-mile loop, a roadway circles the cove for motorists who prefer a scenic drive. Other famed Smoky Mountains sections include the trails of Charlies Bunion, Andrews Bald, and Chimney Tops, with a 1,400-foot elevation, 2-mile hike.