Subterranean Sites

An underground wonderland in Iowa.

Local legends say that a giant who tried to destroy a nearby church lived in this rock cave.

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

Out of a labyrinth of abandoned tunnels and stops, this Queens subway station is arguably the most mysterious—if it exists at all.

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.

The largest underground lake in Europe.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

The largest cave on the island of Menorca was likely the site of Iron Age rites and rituals.

Take an underground boat ride through a former hydraulic raceway that was built in the late 19th century.

This small cave in the center of Isla Colon doubles as a sanctuary.

Would you spend the night in Japan's deepest train station?

Near this coastal cave stands a small memorial to the hermit who made it his home for three decades.

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.