Subterranean in Turkey

This Turkish cave boasts some rather bizarre associations with the King of Mount Olympus.

A sixth-century Byzantine cistern hidden below a modern carpet store.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.