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

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

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

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

A deadly ancient portal to the underworld.

The oldest Christian monastery in Iraq until ISIS blew it up twice and then drove over it with bulldozers.

This 23-foot-tall bear stands amid the hustle and bustle of Hamad International Airport.

This fountain pays homage to Qatar's history of pearling, the primary industry before oil.

The building is a gigantic piece of art inspired by the shape of a desert rose.

A 19th century pearling and fishing village abandoned before Qatar's economic boom.

A creepy, deserted mock Arabian village can be found in the middle of the Qatari desert.

The shallow, salty inlet was a safe haven for 19th-century pirates.

Some of the ancient-looking huts among these strange rock formations aren't ancient at all, but built as part of a movie set.

Climb down into the largest sinkhole in Qatar.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

The second oldest continuously operating bar in Louisiana.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

The sweet story of how American cargo planes became known as "Candy Bombers" during the Berlin Blockade.

One of corporate America's best-kept secrets is also one of the most publicly displayed.