A modern sliver of architecture in Roma.

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

A fairy tale castle in modern Rome.

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

2300-year-old Roman road connecting the empire.

Jesus' footprints and the first catacombs in the world.

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

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

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

The Pope’s secret escape route.

Gods clash with machines in a power plant regenerated as a museum.

The underground sanctuary of a mysterious ancient cult.

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

Harlequin costumes, signed scripts, and armor-wearing puppets.

The final resting place of the poets Shelley and Keats.

Roman-era ships unearthed...

Ever hear of the Milazzo Cage?

A hospital where antique dolls are given new life.

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

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

Architectureal fantasy quarter of Rome.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A Nesting Doll of Churches.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.