Many question how National Park Service employees could comply, given the Trump administration’s workforce reductions.

Traverse 330 steps on the way to such distinctive chambers as the “Devil’s Kitchen” and the “Crystal Vault.” Wild caving ...

This popular cave hike requires visitors to make their way through small openings, crouch lower than 45 inches at times, and ...

SEQUOIA NATIONAL PARK (KFSN) -- After a four-year closure, Crystal Cave in Sequoia National Park is finally opening to ...

Stalagmites that formed in caves hundreds of thousands of years ago preserve a record of how fires behaved the last time Earth’s temperatures were as high as they are today. New Scientist ...

Under a swath of Kentucky hills and hollows is a limestone labyrinth that became the heartland of a national park. The surface of Mammoth Cave National Park encompasses about 80 square miles.

For decades, the Oregon Caves National Monument and Preserve has been Oregon’s quietest national park site, a remote destination at the end of a long, winding road in the southwest corner of the ...