As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

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

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

The underground sanctuary of a mysterious ancient cult.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

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

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

A submerged archeological park still holds the wonders of a Roman Sodom.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A 16th-century horror show built in a lovely Italian garden.

Architectureal fantasy quarter of Rome.

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

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

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

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

This tiny islet has somehow housed an ancient temple, two monasteries, a church, a fortress, and a restaurant.

A medieval weapon rumored to have been used by the brilliant poet himself.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

The mummified relic of St. Antoninus.

This museum is rotten with a century of wax medical deformities.