An eerie, derelict amusement park in Berlin.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

Jesus' footprints and the first catacombs in the world.

An enigmatic modern marker left next to a historic Roman site.

2300-year-old Roman road connecting the empire.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

A fairy tale castle in modern Rome.

Architectureal fantasy quarter of Rome.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

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

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

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

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

A Nesting Doll of Churches.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

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

Architectural monsters are devouring this palace's every door and window.

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

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

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

A beautiful maze marks where three countries meet.