Mausoleum and Holy Seat of Antiochus I of Commagene.

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

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

The ancient latrines of the Greeks, in all their public glory.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

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

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

This beautiful train graveyard is one of the largest collections of steam locomotives in the Mediterranean and Europe.

A charming beach town in Turkey captures all the colors of the rainbow.

A mysterious ancient cemetery with Roman sarcophagi and Lycian inscriptions.

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

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

Turkish adventurer antiques in the heart of the Grand Bazaar.

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

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.

A Turkish ghost town abandoned in a population exchange with Greece.

Hidden just under the waters around this Turkish island are the ruins of a once great city.

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

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

A marvel of Byzantine engineering under the streets of Istanbul.

Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.