The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

Jesus' footprints and the first catacombs in the world.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Architectural monsters are devouring this palace's every door and window.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

Architectureal fantasy quarter of Rome.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

A striking memorial recalls thousands of Bolognese men and women killed fighting fascists in World War II.

The wreckage of a tragic plane crash is on display at this museum devoted to a famous Italian conspiracy.

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

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

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

The mummified relic of St. Catherine sits forever on a golden throne.

This castle was once the home of one of the most powerful women of the Renaissance.

This Renaissance square was at the center of Leonardo da Vinci's map, the first ichnographic ever.

Also known as "Hell Alley," this tiny street in Imola gained its name in a bloody episode in the 16th-century.

The remains of an ancient Roman city are hidden underneath Bologna's beautiful public library.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The location where a famous medieval knight was murdered.

Everyday, fans from across the globe visit the statue of one of the greatest Formula One drivers in history.

An intact, still operating pharmacy from the 18th-century filled with numerous artifacts and paintings.