Rome's first modern graffito is all that is left of a peaceful protest from the 1970s.

An unremarkable wooden wheel built into the side of one of Rome's oldest hospitals was part of a policy to reduce infant exposure.

A colossal aqueduct from the second century B.C., deeply hidden in a gorge on the outskirts of Rome.

Plaques on its facade commemorate the Tiber's most destructive deluges.

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

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

Rome is now home to a stunning food museum and library.

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

Its interior is adorned with some of the best examples of early Christian mosaics.

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

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

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

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

Roman-era ships unearthed...

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

Ancient ruins hidden underneath a modern luxury hotel.

This ancient market is often referred to as the oldest shopping mall in the world.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

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

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

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

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

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