Anatomical cabinet holds unexpected treasures.

One of the largest caves in the world open to the public.

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

Ever hear of the Milazzo Cage?

The astonishing collection of an infamous criminologist.

David Sedaris called it "The greatest shop in the world."

Virgil's many-mouthed gateway to the underworld.

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

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

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

The underground sanctuary of a mysterious ancient cult.

The largest and most famous wax anatomical collection anywhere in the world.

The glowing blue Nymphaeum of Emperor Tiberius.

Stalactites and stalagmites in a beautifully lit cave.

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

Thousands of well-dressed mummies below a monastery.

The vast, legendary catacombs hold secrets much stranger than stacked bones.