The Pope’s secret escape route.

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

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

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

The first statue to be added to Saint Peter's Square in over 350 years is an ode to migrants and refugees around the world.

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

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

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

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

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

One of the most important yet well-hidden museums dedicated to the history of medicine.

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

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

2300-year-old Roman road connecting the empire.

The underground sanctuary of a mysterious ancient cult.

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

Breathtaking and huge 430 year old maps of Italy.

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

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

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

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

This ancient Hawaiian henge may have been an early star chart.

A rare specimen of an iconic extinct animal in downtown Sydney.