This field of half-buried stone crosses was the burial place of a sect of heretical gnostics.

Cave on extinct volcano, once home to famous mathematician Pythagoras.

These ruins in Volvi were once at the intersection of the Eastern and Western Worlds.

An alien landscape on the banks of the Aegean Sea.

The hermits of Karoulia protect their asocial lifestyles by living on the vertical face of a treacherous precipice.

Hideout of thieves, monks, and goat-footed gods.

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

Remnants of an exploded schooner and wrecked submarines form a breakwater.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

The ghost town where the villagers refuse to leave.

A local landmark that has become a hub of graffiti and urban exploration.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Super-heavy Nazi architectural experiment.

Blitzkrieg bop your way through Berlin's Ramones Museum.

This modest marker near Notre Dame identifies the very center of Paris.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

A site where “the ravages of the war are more striking…than any other place in contemporary Spain.”

This open air archeological site houses almost as much wildlife as it does classical religious artifacts.

The temple that withstood the Nazis.

Temple complex that once housed the famous statue of Nike.