Visitors will be able to enjoy a half-mile loop through the narrow passages and steep sections of the stunning marble cavern ...

Sistema Sac Actun (Mexico) – Located in the Yucatán Peninsula, it's one of the world’s longest underground rivers, connected to ancient Mayan cenotes. Lost River (USA – Indiana) – This river vanishes ...

Sinkholes have gulped down suburban homes, Corvettes, the White House lawn, a sizable chunk of Louisiana, and even people.

Eroded from the thick limestone bedrock over hundreds of thousands of years, these karst features ... oversize—Deer Cave hinted at what more awaited underground. Over three months in Mulu ...

Hop on a ferry to Nanaimo and prepare to hit the road for a mini road trip to Little Huson Caves Regional Park.

Several rivers across the world have mysteriously vanished underground or flow beneath the surface for miles, puzzling ...

This serial property is an unusually well-preserved and extensive epigenic gypsum karst terrain. It includes a very high density of caves: over 900 caves in a relatively small area, with over 100 km ...

South China Karst is one of the world’s most spectacular examples of humid tropical to subtropical karst landscapes. It is a serial site spread over the provinces of Guizhou, Guangxi, Yunnan and ...

Fluorescent caves on Earth may hold the secrets to survival necessary for scientists to detect life elsewhere in the universe.

Register at [email protected] and we will contact when confirmed details including dates and prices are available. Explore Slovenia's breathtaking underground wonders on a gentle walking tour ...

Unlike the rest of the state, southwest Missouri has what is known as karst topography: a landscape characterized by caves, fissures, sinkholes and underground streams. If agriculture ...