A sulfuric hellscape in southern Italy.

This Italian dam is covered in salt-hungry goats who manage to scale its almost vertical face.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

Anatomical cabinet holds unexpected treasures.

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

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

The world's most active stratovolcano is almost always erupting.

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

Medieval torture techniques with a modern conscience.

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

The astonishing collection of an infamous criminologist.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

Where Aleister Crowley taught magick in "La Chambre Des Cauchemars," his "Chamber of Nightmares."

The plague quarantine island home to the alleged "Vampire of Venice."

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

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

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

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

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

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

Jesus' footprints and the first catacombs in the world.

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