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

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

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

Hidden within this iconic mountain are a set of World War II bunkers once used by German forces.

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

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

The mystic whose incorrupt corpse still attracts the faithful.

This hidden alley near the location of Rome's first theater was the site of a curious miracle.

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

A hospital where antique dolls are given new life.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

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

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

A massive marble foot is tucked away in a small alley near the Pantheon.

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

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

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

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

A forgotten "city of water" underneath the famous Trevi district.

An alchemist's "magic door" stands in the middle of a Roman park.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

Ancient ruins hidden underneath a modern luxury hotel.