An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A Milanese café entirely designed by the American director Wes Anderson.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

100 year tradition of fist fights, marked by marble footsteps.

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

This "floating railway" is one of the world's oldest monorail systems.

The enigmatic sculpture hides above an escalator in a Milan metro station.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The Rozenberg wind wall in South Holland makes for smooth sailing through the Calandbrug canal.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

A striking memorial to the Jews of Leiden who were murdered during World War II is scattered throughout the city.

Cat art as far as the eye can see.

This historic Dutch newspaper building is covered with media-themed details—and one unrelated oddity.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Pop culture has helped to keep this iconic British building from being destroyed.

This century-old street sign is a forgotten remnant of the old city.

This singular Mexican structure is considered a masterpiece of the Tapatía architectural school.

This structure was moved nearly 40 feet while people continued working inside it.