Caves

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

Largest cave system in Africa.

Limestone caves with spectacular showcase chambers.

A wonder of natural limestone formations etched by millions of years of natural interaction between rainfall and rock and air.

An ethereal glowing blue ocean cave in Croatia.

These azure waters were thought to lead to the Mayan Underworld.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

An odd little fishing town that is inundated by tourists looking to be locked up in a cage and surrounded by great white sharks, because why not?

The first tourist attraction to offer tours for interstellar tourists.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

A series of gun powder chambers currently hidden from view within Nobbys Headland in Newcastle, Australia.

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

A stealthy Apache hideaway that became the haunting site of a mass grave.

Limestone caves in the Cambodian countryside, once the site of genocide, now a place of peaceful beauty.