To determine the best U.S. national parks, U.S. News considered the opinions of both travel experts and recent park visitors.
Considered one of the world's best places to visit, Glacier National Park spans two mountain ranges and includes more than 700 lakes across Montana.
Other activities include a ride along the scenic Going-to-the-Sun Road and a trip to the unique Waterton-Glacier International Peace Park.
The Grand Canyon is so magnificent that even the highest quality photos don't do the Arizona park's vast beauty justice – you just have to see it in person.
Even if Yellowstone didn't hold the incredible distinction of being the world's first national park, the 2.2 million-acre park, which stretches across Wyoming, Montana and Idaho, could easily stand on its own.
Spend a day on the water by renting out a sailboat, try your hand at beach volleyball, or even roast marshmallows with friends at one of their many summer bonfires.
One of California's most-visited national parks, Yosemite National Park stands out for its bevy of impressive waterfalls.
There are also ample scenic hiking and camping opportunities; just keep in mind that campsites sell out quickly after becoming available for booking, so make your reservations in advance.
Utah's Zion National Park is a paradise for thrill-seekers. Hike Angels Landing, which brings you up through a nearly 1,500-foot natural staircase.