Khmer Rouge's high security prison.

A battle between nature and architecture in the Cambodian jungle.

5,000 skulls in memorial to those killed by the Khmer Rouge.

This famous archeological mystery may be an ancient example of movable type.

Swarms of dainty flying insects swarm into the Petaloudes Valley to get busy.

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

Five candy-colored villages on the Italian Riviera.

A sunken idol welcomes parishioners to Davy Jones' Locker.

A stunning cemetery famous for its extraordinarily delicate & lifelike mourning sculptures.

Massive galleon from a box-office bomb docked in Genoa.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Metro station with a claim to rock n' roll fame.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

A fascinating insight into daily life in the Eastern Bloc.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This massive underground salt mine now holds a sci-fi theme park in its depths.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

This snug medieval lane is one of the narrowest streets in the world.