An Austrian house of bones filled with hundreds of intricately painted skulls.

The place where World War I began.

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

This one-time health resort was used by aristocrats around the world.

The giant skeleton sculpture is surprisingly well-traveled.

A collection of grotesques lines the walls of this Italian villa.

Thousands of well-dressed mummies below a monastery.

A collection of wax anatomy by the great sculptor Clemente Susini.

Giant, pink stuffed rabbit on an Italian mountain.

Stalactites and stalagmites in a beautifully lit cave.

A dead saint, a deadly poison, and a mysterious holy ooze.

An Italian hillside ghost town.

A wild annual race in Sardinia re-enacts Constantine's victory in Rome.

Ancient cave tombs known as the "houses of fairies."

Mysterious tombstones thought to be remnants of Atlantis.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The glowing blue Nymphaeum of Emperor Tiberius.

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

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

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

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

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

Virgil's many-mouthed gateway to the underworld.

Caligula's colossal pleasure ships, discovered by Mussolini only to be lost in flames.