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

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

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

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

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

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

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.

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

This delightful little museum is dedicated to only one thing: pasta.

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

A Nesting Doll of Churches.

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

Giant, pink stuffed rabbit on an Italian mountain.

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.

Natural cathedral designed by Italian artist Giuliano Mauri.

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

Crushed coral and crystals give the sand its signature coloration.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

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

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

Abandoned medieval hill town.