This building holds the embalmed remains of the leader of the Bolshevik Revolution.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

Ancient serpentine sacrifice holder that has stood the test of time.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

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

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

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.

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

This massive subterranean fissure is known as the "underground Grand Canyon."

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

A 15th-century granary that played the role of futuristic slave quarters in the world of 'Star Wars.'

An ancient necropolis of magnificent tombs.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This legendary city has been a tourist attraction for centuries.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.

Britain's only artificial surfing lake is nestled in the beautiful mountains of Wales.

The castle still holds traces of the abandoned Roman fort it was built atop.

Stroll through Welsh history in a village of reconstructed structures.