The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

Ancient ruins hidden underneath a modern luxury hotel.

Southern Italy's spinning top village.

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

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

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

One of the largest caves in the world open to the public.

A forgotten "city of water" underneath the famous Trevi district.

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

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

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

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

One of seven Jewish catacombs in Rome and one of only two open to the public.

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

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

Go inside to really appreciate this 500-year-old technological masterpiece.

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

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

An Italian hillside ghost town.

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

Thousands of well-dressed mummies below a monastery.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.