For centuries, humans have lived underground. Today, that ancient practice is under dire threat—even as cave life makes more ...

That’s exactly what happens at Indian Echo Caverns in Hummelstown, Pennsylvania – a subterranean wonderland that somehow remains one of the state’s best-kept secrets despite being, well, absolutely ...

Nestled in the Laurel Highlands region of southwestern Pennsylvania, this underground labyrinth is the state’s largest cave system, and boy, does it know how to make an entrance. When I first heard ...