This large, circular tomb is the final resting place of the first emperor of Rome.

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

Romans built the world's tallest artificial waterfall in 271 BC.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

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

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

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.

Naturally preserved bodies are eerily staged throughout the crypt in varying poses.

A British Commonwealth cemetery in the heart of Milan, with 421 allied soldiers died during World War II.

Da Vinci's equestrian statue, 500 years in the making.

The world's first underwater farm is home to more than 700 plants.

One of the highest emergency huts in the world has been waiting almost a century to give imperiled climbers a place to lie down.

Sleep amongst an abundance of art from the modern era.

This building was designed to celebrate Italy's victory in World War I.

The astonishing collection of an infamous criminologist.

This fountain is dedicated to the workers who perished constructing the Fréjus Rail Tunnel.

A fake medieval village in the middle of Turin.

This building has a giant piercing through one of its corners.

When this funny little building went up in the 19th century, most people thought it would simply fall over.

A small island in Lake Garda that was used as a burial site, pirate hideout, and a monastery.

The Cathedral of St. Ambrose has been hiding a special parishioner within its walls.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.