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

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

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

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

One of seven Jewish catacombs in Rome and one of only two open to the public.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

A fairytale island floats in the middle of Italy's little-known Lake Orta.

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

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

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

The plague quarantine island home to the alleged "Vampire of Venice."

Crushed coral and crystals give the sand its signature coloration.

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.

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

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

A hospital where antique dolls are given new life.

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

Giant, pink stuffed rabbit on an Italian mountain.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

Pilgrimage site for star-crossed lovers.