Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A collection of objects supposedly singed by the hands of souls in purgatory.

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

This basilica is dedicated to two saints, one of which is known more for his famous quote.

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

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

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

This small church was constructed over the ruins of three temples dating to the Roman Republic.

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

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

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

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

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

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

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.

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

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

Ancient ruins hidden underneath a modern luxury hotel.

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

A sculpture serving as an homage to Pope John Paul II.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.