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

A special area of the National Archaeological Museum of Naples is located inside a metro station.

Suffocating dogs was a common spectacle in the fumes of this noxious cave.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

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

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

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

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

Physicist’s epitaph provides final confirmation to a career of turmoil.

The first modernist church in Europe.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

A magnificent collection of imperial armor and weaponry.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The beautiful baroque library of the Hapsburg empire.

The most visited, and possibly most controversial, museum in Germany.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

This allegedly haunted 16th-century tower house-turned-museum exhibits thousands of spectacular objects.

A book bound in the skin of an infamous criminal, along with countless other specimens.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

A 18th century graveyard and its astonishing cortege of macabre iconography.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.