This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

A medieval wash house where people washed clothes in a river allegedly formed by the tears of a mourning nymph.

According to the legend, this structure was built in a single night with the help of the devil.

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

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

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

Ancient snack bar of the Roman Empire re-opened.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

These bronze horses on the gates of the Royal Palace of Naples were a gift from a Russian tsar.

This medieval city gate is now a blend of the past and the modern world.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

A plaque on the base of this statue holds a bewitching design.

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.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

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

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

This 2,000-year-old Doric bridge is still open to pedestrian traffic to this day.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

A medieval, mosaic-lined baptistry built by a heretical Christian sect.

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