An Italian hillside ghost town.

Southern Italy's spinning top village.

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

This medieval Italian town is a sheer (and beautiful) cliffside defense.

The glowing blue Nymphaeum of Emperor Tiberius.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

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

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The middle finger of modernity.

After the parade, students throw their beads on the tree hoping for good luck on exams.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

Imagine playing a version of Legends of the Hidden Temple, but with a distinctly Southern Gothic flare.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

According to one local tradition, the entrance to the Voodoo underworld can be found in New Orleans through seven gates scattered throughout the city's French Quarter.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.