There’s a cave in Illinois that watches the Ohio River go by. It’s big, strange, and way more memorable than expected.

Step off the desert trail and into Arizona’s longest cave, where crystal formations and subterranean wonders await.

The county said a cave collapse formed a large hole, revealing a 200 foot cavern underneath. Three homes sit on top of it. KVUE spoke with Jay Banner, geosciences professor at The University of Texas.

ALBUQUERQUE, N.M. — The Big Room at Carlsbad Caverns, a room that could fit more than six football fields and reach the height of a 30-story building, inspires awe among visitors, but it’s a nagging ...

Named Colossal Cave, with more than two miles of passageways that have been explored and mapped, it is likely that there are still areas that have never been seen. Tours of the cave, where the ...

Below the Chihuahuan Desert in southeastern New Mexico, lies an extensive system of limestone caves, among them the famed Carlsbad Cavern, home to one of North America's largest underground chambers.

Below the Chihuahuan Desert in southeastern New Mexico, lies an extensive system of limestone caves, among them the famed Carlsbad Cavern, home to one of North America’s largest underground chambers.