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

This Italian foot path winds through the mountains via 52 individual tunnels.

Where Aleister Crowley taught magick in "La Chambre Des Cauchemars," his "Chamber of Nightmares."

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

The location of the last witch trials of Italy, known as "The Salem of Europe."

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

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

Pilgrimage site for star-crossed lovers.

Giant, pink stuffed rabbit on an Italian mountain.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

A collection of objects supposedly singed by the hands of souls in purgatory.

Abandoned medieval hill town.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

Architectural monsters are devouring this palace's every door and window.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

An Italian hillside ghost town.

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

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

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

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

The final resting place of the poets Shelley and Keats.

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