An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

Ancient ruins hidden underneath a modern luxury hotel.

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

2300-year-old Roman road connecting the empire.

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

This statue is the only female representation of Rome's "talking statues."

A small but very fascinating fountain in the center of Rome with four books and a deer carved.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

A deep mark on the remains of a Roman temple, believed to be left by a legendary warrior.

Inside this building is another country within Rome, a sovereign entity without a physical territory.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

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

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

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

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

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

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

A rare example of a medieval house in Rome adorned with a melancholic inscription.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

This curious, round temple is the oldest still-standing marble building in Rome.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

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

This is the oldest Roman-made bridge in the city still existing in its original state.

A 15th-century monumental Latin inscription on this house celebrates Lorenzo Manilio's love for Rome.