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.

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

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

Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

A little sculpture with a large wardrobe.

Museum preserving torture methods from the past.

The history and future of cannabis.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

Impossibly life-like natural history models created out of glass by a father and son.

Three prestigious academic collections come together to create a world-class natural history museum.

Statue commemorating the use of ether in anesthesia.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This massive solar system model is sprawled out across Maine's suburban wilderness.