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

The Hagga Basin and its surrounding Rift regions are marked by dramatic terrain shifts and even tougher foes. While you’ll find fewer Sandworms here ...

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 ...

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 ...