This embalmed man is one of the best preserved mummies from the Canary Islands.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

Christ's blood preserved in a Belgian town.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

One of the world's oldest universities houses an incredible collection of anatomical models, mummified body parts, and human bones.

The morbid items in this small and hidden museum are not for the weak stomached.

A landscape decorated with enormous skull sculptures.

Natural mummies hidden in the crypt of a medieval French church.

Thousands of well-dressed mummies below a monastery.

One of Ireland's most infamous prisons for rebels including men, women and children.

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

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

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

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

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

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

The oldest operating pharmacy in the world features 800-year-old recipes.

A curious collection dedicated to human and animal anatomy and pathology.

Museum preserving torture methods from the past.

The world's only museum devoted to the wonders of fluorescence.