A mural recalls a fictional woman who once lived at 23 Quai du Commerce, 1080 Brussels.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

One of the world's largest collections of pathological specimens.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

The anatomical-pathological collection of a man who changed surgery.

A little slice of Japan and its aesthetics in London's Holland Park.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

This handsomely carved wooden church is more than 800 years old.

Home to three historic ships from the age of Vikings.

The painter of "The Scream" is laid to rest under a stoic bust of himself in the humble corner of an Oslo cemetery.

A must for film lovers in Madrid and home to the Spanish Film Library's projection space.

Strange masks and obscure costumes are housed in this old Madrid corrala.

This lucky bronze frog was gifted to Madrid by a casino.

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

A pilgrimage site where people ask Saint Dymphna to watch over those who are not of sound mind.

The former home of a trailblazing surrealist is still filled with haunting dolls and grim paintings.

Most prolific publishing house in the 1600s open to the public.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.