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

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

Rome’s legendary peephole vista is also a former Crusader stronghold.

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

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

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

A large replica of a monumental Roman inscription is located on the side of this museum.

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

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

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

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

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

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

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

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

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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

Where members of the Crossbow Corps of San Marino demonstrate their skills.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

High in the clouds of San Marino sits an ancient tower with some curious prisoner graffiti.

This 2,000-year-old Doric bridge is still open to pedestrian traffic to this day.