A network of underground water channels that dates back to the Middle Ages.

A stunning medieval castle houses this eclectic, interactive tribute to all things wine.

A deep mark on the remains of a Roman temple, believed to be left by a legendary warrior.

This network of roads is one of the most unique Etruscan creations ever discovered.

The now-abandoned Fascist summer colony served a dark purpose during World War II.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

An ancient Roman temple first dedicated to an emperor's wife is now a church.

The mountaintop inspiration for Umberto Eco's "The Name of the Rose."

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

This medieval hilltop village was abandoned at the end of the 19th century, after existing for more than 500 years.

A unique form of erosion created an uncanny landscape of boulders perched atop slender columns of clay.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

Ride a boat through this magnificent underground world, which now doubles as a theater.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

A fake medieval village in the middle of Turin.

Just across from the "Last Supper" painting is the famous painter's vineyard, a gift received for creating the masterpiece.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

100 year tradition of fist fights, marked by marble footsteps.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

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

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

Five candy-colored villages on the Italian Riviera.

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