The world's largest rotating world.

The largest axe on the planet contains a time capsule that seems like it may never be discovered.

The footprint of a frustrated devil in Munich's Cathedral.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

The first hospital in the New World.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The eccentric mansion of one the most popular horror authors of modern times.

This skewed English house has looked like it's going to fall over for centuries.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

Built in 1512, the oldest cathedral in the Americas.

The stoutest tree in the world.

A battle between nature and architecture in the Cambodian jungle.

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

Khmer Rouge's high security prison.

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

The prototype for all Nazi concentration camps.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.