The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

David Sedaris called it "The greatest shop in the world."

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

Ruins of a 10th century church tucked away deep in a botanical garden.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This museum is rotten with a century of wax medical deformities.

The oldest operating pharmacy in the world features 800-year-old recipes.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

Structure built from the skulls of vanquished foes.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

This abandoned Olympic skiing facility still bears the scars of the Siege of Sarajevo.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

Yugoslavia's biggest underground airport lies in ruins.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

This once luxurious Catskills resort is now a haunting ruin.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

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

A kaleidoscopic warehouse-maze of handmade neon signs.

The only gulag ever to exist in socialist Yugoslavia.