The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

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

The astonishing collection of an infamous criminologist.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

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.

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

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

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

Giant, pink stuffed rabbit on an Italian mountain.

Pilgrimage site for star-crossed lovers.

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

This centuries-old Italian chapel hangs midway down a sheer cliffside.

This 16th-century monastery has been turned into a surrealist architecture compound.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

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

The oldest operating pharmacy in the world features 800-year-old recipes.

2300-year-old Roman road connecting the empire.

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

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Rome's semi-secret peephole vista is also a former Crusader stronghold.