Our two-person team loaded the car with a GPS, a drone, notebooks, sample bags, a trowel and a flat spatula lovingly called a ...

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 ...

Laurel Caverns near Farmington isn’t just another hole in the ground—it’s Pennsylvania’s largest cave system, a subterranean playground where Mother Nature decided to show off her artistic side.

Vietnam is home to the world's largest cave. It's so vast that it has its own weather system and could fit an entire city ...