Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

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

The mystic whose incorrupt corpse still attracts the faithful.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

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

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

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

Nestled in the heart of Milan is a real wunderkammer of morbid curiosities.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

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

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

An eerie, little-known Neapolitan museum filled with preserved human remains.

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

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

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

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

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

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

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

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

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.