Fortresses in Turkey

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

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.

Mediterranean castle on a tiny Turkish island.