Underneath the earth’s belly, a boat ride inside a 30-million-year-old all-water cavern, Penn’s Cave, reveals nature’s most ...

A newly discovered supercave in Spain stretches 16.5 miles, featuring a 3,000-foot vertical drop. What lies beneath?

For those seeking natural beauty, Mackinac Island State Park, which covers approximately 80% of the island, offers a network of trails that wind through dense forests, alongside limestone formations, ...

While you might assume the Nullarbor Plain is a vast expanse with not much to see, a recent discovery has stunned scientists.

Montana has several state parks worth visiting, but if you want to see the very first one that offers limestone caverns, here ...

Learn key facts about Dames Cave Trail in Withlacoochee State Forest from hidden sinkholes to forest scenery so you can hike ...

Dirt, ice, and greenery can all conceal hidden or forgotten cities. Here are five cities that were rediscovered through ...

Hidden deep in a remote Thai cave, scientists stumbled on a spiked, dragon-like creature clinging to the rocks—unseen by ...

Explorers in southern Spain have linked two deep caves into one “supercave system” about 16.4 miles long. The connection sits ...

Florida may be best known for its soft-sand beaches, but the state is also home to many other beautiful natural wonders.

Scientists have identified several caves carved by water and they may have held or have evidence of extraterrestrial life.

Sinks Canyon State Park is famous for its "disappearing river," but that's not all there is to see at the Fremont County ...