The world's oldest bookshop still in operation.

A neolithic tomb converted into a tiny chapel.

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

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

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

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

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

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

The final resting place of the poets Shelley and Keats.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

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

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

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

A modern sliver of architecture in Roma.

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

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

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

2300-year-old Roman road connecting the empire.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.