There's no shortage of caves and caverns available to visit in the state of Pennsylvania. Each location delivers on wow-factors and the chance to learn, spend time together, enjoy the great outdoors ...

The Marble Caves (Cuevas de Mármol) are natural rock formations located in the glacial lake General Carrera, situated in ...

What lies beneath can be cold, damp and compelling. Learn about dry and wet caves, the creatures that live in them and the characteristics that create these natural settings. Here are five places to ...

You may not realize that the U.S. is filled with hidden, mysterious caves. Several are part of the national or state parks, and they're worth the excursion. Whether you are a thrill seeker looking for ...

The large-format IMAX cameras have gone into outer space and under the sea; now they venture into claustophobic caves in this stunning documentary. The film profiles spelunkers Hazel Barton and Nancy ...