Saguaro cacti can live for over 200 years and are a symbol of the American Southwest.
Beneath the waters of Washington's Olympic National Park lies a submerged forest of ancient trees.
Over 1,000,000 Brazilian free-tailed bats take flight each evening from Carlsbad Caverns National Park.
Alaska's Denali National Park boasts a moose population larger than some U.S. states.
Petrified Forest's Colorful Logs
Petrified logs in Arizona's Petrified Forest National Park are not just shades of gray but boast a vibrant array of colors.
A stretch of Highway 50 that passes through Great Basin National Park has earned the title "The Loneliest Road in America."
This park in Ohio hides more waterfalls than any other U.S. national park.
The park is home to a unique species of moth that solely pollinates the Joshua tree.
Witness the mesmerizing spectacle of lava flows at Hawaii Volcanoes National Park.
Explore intricate underground formations in Guadalupe Mountains National Park.
Florida's Everglades National Park is a haven for birdwatchers with over 360 bird species.
Enjoy breathtaking views along the scenic Skyline Drive in Shenandoah National Park.
Discover over 2,000 natural stone arches at Utah's Arches National Park.
Mammoth Cave National Park in Kentucky is the longest cave system on Earth.
It's America's largest national park, covering over 13 million acres in Alaska.