We got access to a river cave located right in a homeowner’s backyard - and what we found inside was nothing like we expected ...

We take on a 280-foot rappel down a powerful underground waterfall deep inside a river cave. This is part 3 of our journey, ...

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

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

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

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

There’s an entirely different world underground in the 209. And you can find a bit of it in Volcano. And one of the best ...

Lost River Cave, a nature attraction in Bowling Green, is under roughly 60 feet of floodwater as severe storms dropped tremendous rainfall across the region ...

A team of explorers rappelled into the shaft-like cave and found a “pinkish” animal living in a cold river of the “deep dark zone.” Take a look.

is an underground river and collection of caves. The bright turquoise water contrasts with the caramel- and mocha-colored rock formations within the caves, which include stalactites and stalagmites.

The underground river, the Meramec River, just adds to the cave's allure and is a drawing point for visitors. Some of the highlights of the Onondaga Cave tour include: King's Canopy: a massive ...