This mysterious cliffside carving of an ancient Hittite deity has baffled scholars for centuries.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

This hidden gem is bathed in beautiful natural light.

A mysterious ancient cemetery with Roman sarcophagi and Lycian inscriptions.

The ancient abodes are a testament to human ingenuity amid harsh climates.

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

A Turkish monastery tucked into a cliff wall.

Standing proud atop a Turkish bluff, this Ottoman palace has retained its grandeur despite being abandoned for centuries.

Roman ruins, natural methane fires and a lovely beach.

The best-preserved ancient theater in the world.

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

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

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

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

Naturally protected city carved from a rock face.

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

An abused and forgotten metropolis, abandoned for centuries.

This former Imperial summer home was the venue for a royal slap that once echoed 'round the world.

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

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.

1513 Turkish world map, full of European state secrets and snarky commentary.

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

A marvel of Byzantine engineering under the streets of Istanbul.