This museum was invented in a novel before being made real by the author.

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

Roman ruins, natural methane fires and a lovely beach.

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

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

Turkish adventurer antiques in the heart of the Grand Bazaar.

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.

An abused and forgotten metropolis, abandoned for centuries.

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

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.

Thanks to a spelling mistake this bizarre beaver-tiger hybrid became the symbol of a Siberian town.

The ruins of this prominent glass factory yield hidden treasures buried among the jungle floor.

A Buddha-filled cave that is named after a giant monster spider.

Caves full of Buddhist statues, incredible rock formations and a deserted lagoon.

This unique temple complex remains off the typical tourist trail.

The largest monastery in Singapore is home to a crematorium, a college, and one of Asia’s largest indoor Buddha statues.

Tower with a double-helix spiral, adorned with letters of the Georgian alphabet.

The last standing example of an ancient district's teatime tradition.

The secret room where early Bolsheviks cranked out propaganda fliers on a smuggled printing press.