Underground

Underneath the well-known Lindenhof hides a secret cellar documenting Zurich's early history.

This 500-year-old stepwell descends seven levels deep into the ground.

An antiquated aquarium housed in a converted government anti-nuclear bunker.

A small cave network was discovered under a home in Xagħra, in 1924 when the owner was digging a well.

In 1888, a resident of Xagħra, Malta, discovered a small underground chamber filled with stalactites and stalagmites when digging a well.

According to legend, after Hades pulled Persephone into the underworld, one of her attendant nymphs cried so much that her tears formed this spring.

A former smuggler's haven houses "The Chapel" and its mysterious carvings.

Erosion has transformed this sandstone boulder into a massive dune-filled cavern.

A 4th-century Roman church complete with a hidden underground cave.

Direct access to a gold mine showing the boom and bust of Australia's Victorian gold rush.

A haunted slate mine turned concert hall and a hidden fairy garden.

An underground spring in a labyrinthine cave system, decorated with stalagmites and stalactites.

After 400 years of being closed to the public, this monastery's underground tunnels and secret garden are now a museum.