Subterranean Sites

This Arctic storage facility is a secure backup for agricultural biodiversity.

The deepest hole drilled in the name of science, where evidence of Precambrian life was found.

Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

Stalin's secret bunker.

Poland's oldest salt mine has nearly everything one needs to live underground forever.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

Cretean quarry suggests real-life site for ancient Greek myth of the man-eating Minotaur in his labyrinth.

Over a thousand feet beneath the Detroit streets is a subterranean metropolis few are allowed to enter.

Beyond being incredibly fun, not much can be said about the Hole with certitude.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

Lost subway station nestled beneath Toronto's busy commuter line.

A popular tourist cave with a dark past.

Caves famous for the dragon-slaying saint who lived there.

England's most notorious suicide spot.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

The original film set of Luke Skywalker's Tatooine home from the 'Star Wars' trilogy.

The world's largest vertical wind tunnel.