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

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

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

A statue representing a lost Roman profession that was vandalized for centuries.

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

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

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

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

A brutalist gem towering over the heart of Milan.

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.

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

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

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

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

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

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

Italian cave with exceptional acoustics and an unsavory history.

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

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

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

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

The astonishing collection of an infamous criminologist.

A burial vault located under Tiber Island in the middle of the Italian capital.