Underground salt caverns, like this one in Northwich, have long been used to store natural gas in the UK A company has settled on Dorset for the site of the UK's second series of underground ...

The Natural Bridge Caverns are home to the biggest commercial cave system in Texas. Above-ground adventures include zip lining, a rope course, a maze, gem mining, shopping and dining. But the ...

These caves in Alabama are underground wonders that tell stories of prehistoric life, hidden gemstones, and even ...