Underground

Deep underground, the rusting remains of a German water pumping station from World War II.

Deep in the limestone cliffs of the Alabaster Coast, a German fortress built during World War II.

The remains of St. Lucius of Chur were said to be kept in this crypt for several centuries.

The crypt under this cemetery's chapel was used as a meeting place by Filipino revolutionaries.

Packed with geological formations, an ancient river, and taxidermied seals, this overlooked coastal cave system is worth a spelunk.

A completely underground tour following the path of the most precious element: water.

A facility built in 1992 for an underground nuclear test remains in place today.

You've probably seen these distinctive orange-tiled columns on the big screen.

The ceiling of this cavern is dripping with multicolored marble stalactites.

The largest underground lake in Europe.