The 65-foot tall Delicate Arch is the most widely-recognized landmark in Utah's Arches National Park.
Theodore Roosevelt National Park.
Located along the coast of northern California, the Redwood National Parks protects nearly half of all remaining coast redwood forests. These iconic trees are the tallest and one of the most massive tree species on Earth.
Dante's View, along the crest of the Black Mountains overlooking Death Valley in Death Valley National Park.
An American crocodile in Biscayne National Park, Flordia.
Snorkelers observe the Elkhorn coral, is the most widely-recognine of the most important reef-building corals in the Caribbean, in Biscayne National Park of the coast of Florida.
An aerial perspective of the Totten Key and offshore reefs of the Biscayne National Park in Florida.
Cataract Canyon, the popular whitewater rafting destination of the Colorado River located within Canyonlands National Park.
Chesler Park located in the Canyonlands National Park in Utah is considered one of the best hikes in the world.
The Colorado River in Canyonlands National Park.
Pothole Point in Canyonlands National Park.
A foggy Crater Lake National Park.
Above Golden Canyon in the Badlands of Death Valley National Park.
An aerial shot of Margerie Glacier in Glacier Bay National Park.
Avery Peak, part of the Appalachian National Scenic Trail.
The sand dunes of Death Valley National Park.
Muldrow Gralcier in Denali National Park.
An ice cave in Glacier Bay National Park.
Johns Hopkins Glacier of Glacier Bay National Park.
Yaki Point, on the South Rim of Grand Canyon National Park.
Though there are mountain lions in Grand Teton National Park, they're a rare sight.
An old settlement in Grand Teton National Park.
Lehman Caves in Great Basin National Park.
Built by the Ancient Pueblo Peoples in Mesa Verde National Park, Cliff Palace is the largest cliff dwelling in North America.
Lake Crescent in Olympic National Park.
The sun sets over Olympic National Park.
The Ozark National Scenic Riverways.
A red fox in the Rocky Mountain National Park.
Old Faithful blasts off in 1969 in Yellow National Park. While it isn't the tallest or largest geyser in the park, it's the most predictable, blasting off every 91 minutes.
The Canyon Narrows in Death Valley National Park.
An aerial view of Crater Lake, Wizard Island and Mount Scott in Crater Laker National Park.
Wizard Island in summer at Crater Lake National Park.
A storm brews over Badwater Basin in Death Valley National Park.
Mt. Foraker in Denali National Park.
The Northern Lights appear in Glacier Bay National Park.
Mt Brooks in Denali National Park.
A storm is breaking to the east over Yavapai Point on the South Rim of Grand Canyon National Park.
A wolf pack surrounds a bison in Yellowstone National Park.
A starry night over Great Basin National Park.
A crown of sequoias in Sequoia National Park, home of General Sherman, the world's largest tree.
With 59 national parks spanning 52,000,000 acres of land across 27 states, the U.S. has one of the most vibrant park preservation programs in the world, overseeing 85,049 miles of perennial rivers and streams, 68,561 archeological sites and 2,461 national historic landmarks, and is home to 400 endangered animal species.