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.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

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

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.