An abandoned film set location for a remote spaceport in a galaxy far, far away hides in the Tunisian desert.

The original movie set for the home of 'Star Wars' hero Luke Skywalker.

An underground nightclub helped spark a "Singing Revolution."

Crumbling pyramids and temple ruins stand within the shadow of this sacred butte.

An enormous Soviet aircraft, the only one of its kind, stands at the deserted shore of the Caspian Sea.

Naturally protected city carved from a rock face.

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

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.

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

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

This ancient city - home to nine civilizations - is soon to be buried under 200 feet of water.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

World's oldest and largest space launch facility, once a secret missile testing site.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

A vast and unlikely aviation museum kept alive for over 50 years due to one man's tenacity.

Ever-growing collection of devils in art.

Legend says lovers who hold hands while venturing along this stone jetty and kiss at the end will remain together forever.

This abandoned office building is a lasting example of Soviet-era architecture.

This disappearing geyser has been attributed to witchcraft, but really it's all about rainfall.

Man-made mineral caves house massive bat colony.

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

A forest park outside Tallinn full of architectural and artistic curiosities.