A recent study shows how fast cities along the East Coast are sinking, with some serious hot spots in NYC. See where, why and ...

Sunken Horizon is unlike anything we've ever done before, an exploration series that takes us beneath the surface, into places that have been untouched for decades and hidden from the world. In this ...

In 1905, a 13-year-old boy, Ben Sands, stumbled upon a remarkable discovery deep within the Craighead Caverns in Tennessee.