The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

This zoological museum began as the first great curiosity cabinet.

A diverse collection of wax, bone, papier-maché and mummified relics.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

Pompeii's less famous neighbor is still revealing her secrets.

An extraordinary collection of 18th century anatomical waxworks.

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

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

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

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

An amazing collection of wax anatomical models and terratological models.

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.