A towering Art Deco movie palace made to look like a Mayan temple.

Anatomical cabinet holds unexpected treasures.

Erotic art covers the walls of the largest ancient pleasure palace.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

The giant skeleton sculpture is surprisingly well-traveled.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Medieval torture techniques with a modern conscience.

The astonishing collection of an infamous criminologist.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

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

A sunken idol welcomes parishioners to Davy Jones' Locker.

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

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

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

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.

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

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

Jesus' footprints and the first catacombs in the world.

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

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

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

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