Macabre astrological automaton clock dating to the late 1400s.

An ever-growing literary collection housed in the apartment where the Russian author penned his final novel.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

A hospital where antique dolls are given new life.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

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

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

The first Russian Orthodox church in the Catholic city of Rome in almost a thousand years.

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

A Nesting Doll of Churches.

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

A fairy tale castle in modern Rome.

The final resting place of the poets Shelley and Keats.

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

Architectureal fantasy quarter of Rome.

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