Brave divers have attempted to identify the source of the mysterious Fosse Dionne spring in the heart of France's idyllic ...

On your next road trip through Oregon, make sure to stop by the surreal cave that features cathedral-like beams of light that ...

Researchers from the University of Northern Iowa are exploring some of the nation’s deepest caves to learn about life in ...

Several rivers across the world have mysteriously vanished underground or flow beneath the surface for miles, puzzling ...

The House budget includes $1.2 million to use drones for creating a 3D map to identify pollution sources threatening clarity ...

Crystal Cave includes more than 3 miles of surveyed passageways, carved by water over roughly a million ... the Sierra Nevada range — and an underground stream runs alongside much of the cave ...

Looking to take an underground adventure in the state of Missouri? There are many wonderful caves you can visit, depending on ...

For instance, Heggen has been collecting water from underground caves and freezing it using liquid nitrogen. She’s comparing the fluorescence fingerprints in the cryogenic ice samples to those ...

Visitors will be able to enjoy a half-mile loop through the narrow passages and steep sections of the stunning marble cavern ...

The underground river ... church services were even held inside the cavern. The cave has a clean water supply, which came in handy during the prohibition era in the United States, and moonshine ...