The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

Flames have been burning within this mountain for more than 2,500 years.

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

Live a night as a Byzantine King, with a minibar and private jacuzzi.

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

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

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

A little-known caravanserai hidden among farmhouses in the Turkish countryside.

Naturally protected city carved from a rock face.

It's believed that this small church was connected to the Hagia Sophia via a secret tunnel.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

Quite possibly the oldest love poem known to humankind.

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

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

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

Ancient serpentine sacrifice holder that has stood the test of time.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

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

The most metal church of all time was built in record time because of an international, pious pissing contest.

This eatery re-creates dishes from the Ottoman Empire so you can dine like a sultan.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.