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

Ottoman-era houses lovingly preserved.

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

Naturally protected city carved from a rock face.

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

An abused and forgotten metropolis, abandoned for centuries.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

A deadly ancient portal to the underworld.

This famous city eluded concrete detection until the early 2000's.

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

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.

A fortress built to pacify local uprising that had a stint as a Nazi concentration camp before becoming a five-star hotel.

One of the world’s best microminiaturist, Nicolaï Siadristy displays his lifetime of tiny creations in this museum.

This ancient burial mound is accessed by an impressive Greek-built archway.

An Art Nouveau building covered in animal gargoyles and grotesques.

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

In the land of the Light Brigade stands a testament to the Cold War.

A castle perched precariously over the Crimean Sea.

A subterranean Holocaust refuge within one of the world's longest cave systems.

This derelict superstructure was a very important warning system for the Soviet military.

Submerged busts of communist and socialist figures from the USSR.

This attraction was abandoned after the Chernobyl disaster.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.