Then, long buried under later deposits, the dead reef became limestone ... Although we were bound for the cave's largest known lake, discovered two months before and seen so far by only six ...

Below a rolling green carpet of rainforest, its limestone is riddled with some of the planet’s most extensive cave systems. “Of course, when I got started, we didn’t have kit like this ...

Deep beneath the Chihuahuan Desert in southern New Mexico is a labyrinth of more than 300 limestone caves, carved over 250 million years ago. The park also preserves biologically diverse desert lands ...

A member of the Iranian Caving and Speleology Association confirmed the discovery of this limestone cave in Barzok by a local resident. The cave features multiple chambers and passageways and ...

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.

ISLA: To Traligill Caves! They’re in the North West Highlands GeoPark and they’re made of limestone. There are three cave entrances in the limestone in this area. But we have to be really ...