An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

The rusted creatures wait to be discovered in Prague's botanical garden.

This spooky statue sits outside a famous Prague theater.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A saintly relic hidden in a Prague church basement.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

This artificial cave looks like something out of a fairytale.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Walk through Czech history in Prague's largest graveyard.

Two stunning 17th-century libraries and a cabinet of curiosities.

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

A burial vault located under Tiber Island in the middle of the Italian capital.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

Medieval torture techniques with a modern conscience.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

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

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

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

One of the most important yet well-hidden museums dedicated to the history of medicine.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

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

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

The final resting place of the poets Shelley and Keats.