Terrifically morbid cemetary and site of famous Paracelsus' grave.

Fantastic stories on a miniature railroad.

A former plague hospital turned medical museum.

Macabre museum devoted to historical Viennese murders.

The amazing wonder cabinets of a very rich Austrian archbishop.

One of the best collections of wax anatomical models in the world.

Ride a dragon train into a world of dwarves.

Op-art architecture designed for happiness.

"World machine" built by an untrained Austrian farmer.

The spectacular history of spectacles on display.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

Strange secondhand shop showcasing taxidermy and oddies

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

Macabre astrological automaton clock dating to the late 1400s.

A Museum of Psychiatry in a still-operating mental institution.

The remains of an encyclopedic sculpture garden later used as an internment camp.

Mysterious Spanish catacombs of unknown origins.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

Famed architect Antoni Gaudi built this generous thank you gift to a friendly host who housed him during a job.

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

The astonishing collection of an infamous criminologist.

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

A madman's personal garden filled with 1,000 sculpted heads.

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