Custom Cave Boat Tours are available ... a bit more adventurous, the Gorge Underground is offering guests the opportunity to hop on a kayak and explore the abandoned mine with the help of expert ...

A lot of cities boast about their underground riding scenes, but none have one quite like Louisville, Kentucky's Mega Cavern Bike Park. Lying 100 feet under the surface of the earth, the 4,000,000 ...

Lambert named the cave and its waterfall after his wife ... To deal with the extreme heat, the residents tend to build their homes underground. Abandoned chambers that have been mined of their ...

The mines were largely abandoned after the city's building ... has dozens of classrooms and offices in the caves and rents out other underground space to businesses. Each year, several foot ...

Entire villages were underground. Some people still live ... curves into the cliff—a storage room opened into dark, abandoned cave until they sealed the gap. Their patio and garden are just ...

investors started finding ways to use the abandoned underground space. A NASA employee needing an area to test sensitive navigational instruments was among the first official cave occupants.