This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

A dead saint, a deadly poison, and a mysterious holy ooze.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

The walls and streets of the ancient city are peppered with penises.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Geometry and mystery come together in an epic show of octagonal masonry.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Southern Italy's spinning top village.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Ancient snack bar of the Roman Empire re-opened.

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

The world's most active stratovolcano is almost always erupting.

Venice's island of the dead.

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

Pilgrimage site for star-crossed lovers.

Five candy-colored villages on the Italian Riviera.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.