The fairy tale castle of the "fairy-tale king."

Hidden in the hills of Hollywood, this secluded Oz-themed garden is dotted with dozens of thrones.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

A wunderkammer of mysterious objects and stories.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A surreal museum of extraordinary industrial objects.

An eerie, derelict amusement park in Berlin.

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

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

A floating cat sanctuary on an Amsterdam canal.

Cat art as far as the eye can see.

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

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

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

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

Private collection of art inspired by cabinets of curiosity.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

Monument on the spot where in 1778, Bathsheba Spooner had her husband Joshua killed and dumped down his own well.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.