The park has a dozen miles of cave trail below ground and 53,000 acres of forest to explore. Now, see some more spectacular photos of America’s national parks.

When Floyd Collins ventured into Sand Cave in Kentucky on Jan. 30, 1925, he was searching for the next big attraction. But he ...

Venturing into the heart of the earth to discover the Cave of Crystals is an adventure like no other. Located in Naica, ...

PANORAMA COMPOSED OF FOUR IMAGES “Well, I suppose there are ... But anyway, no. So far as cave exploration is concerned, Borneo is singular. There’s no place like it under the earth.” ...

Explore the 9 oldest-known archaeological sites, from Theopetra Cave to Göbekli Tepe, and Altamira. Dive into early human history and fascinating cave art.

It took his classmates about 30 minutes to scramble out of the cave to call for help, launching an hourslong rescue, the ...

A massive unexplored cave of "national significance" has been discovered in the Canadian wilderness. It was spotted in April by a government survey team counting the caribou population in the ...

Wisconsin gets incredibly cold in the winter, but don't let that frighten you into staying indoors: these incredible ice caves are calling.