Go inside to really appreciate this 500-year-old technological masterpiece.

Pilgrimage site for star-crossed lovers.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

This bridge made famous in a novel and on-screen wasn't actually built over the river Kwai.

A museum dedicated to a Cold War era sausage.

Tiny memorials honor individual victims of the Holocaust.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Colorful and chaotic stacked hotel in North Holland.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

The prototype for all Nazi concentration camps.

A youth-centric science center hides an industrial triumph.

An obsolete form of timekeeping still marks the hour in this adapted 19th century lighthouse.

The walls and streets of the ancient city are peppered with penises.

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

Ancient snack bar of the Roman Empire re-opened.

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

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

This New Orleans statue of a portly figure in a goofy hat pays homage to a classic of satirical literature.