Beneath its gently rolling hills lies Mammoth Cave, the world’s longest known cave system, offering a mystifying underground world of echoing chambers, cathedral-like tunnels, and prehistoric wonders.

Its most well-known attraction is an underground boat tour. The measure of a city's quality of life often comes down to its connection to nature. Right off Nashville Road in Bowling Green, steps away ...

Casey Anderson is a Montana-based wildlife photographer who has traveled all over the world and has worked with National Geographic, Discovery, and the BBC. He also does a lot of exploring and filming ...

While exploring a cave hidden beneath a residential neighborhood, two explorers made a bizarre discovery. Inside the cavern someone had begun building an entire house underground, complete with a ...

Tourists swim in a cenote, or flooded cave, outside Playa del Carmen, Mexico. The Yucatan Peninsula is dotted with thousands of these interconnected limestone caves, which are fed by a ...