New clues from the day the dinosaurs died. A mysterious ancient human tooth. Primordial galaxies. See how the past year ...

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?

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 ...

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 ...

Top of the Rock Ozarks Heritage Preserve in Ridgedale, Missouri, is the place to be this holiday season with Nature at Night, ...

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.

A ridiculous but instructive thought experiment involving deep time, plate tectonics, erosion and the slow death of the sun ...

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