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

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

Architectureal fantasy quarter of Rome.

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

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

A huge enchanting public park just outside the ancient walls of Rome.

A modern sliver of architecture in Roma.

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

An Italian ghost town that fought obscurity, until a mysterious illness brought it to its knees.

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

One of seven Jewish catacombs in Rome and one of only two open to the public.

The Pope’s secret escape route.

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

Jesus' footprints and the first catacombs in the world.

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

The final resting place of the poets Shelley and Keats.