A 16th-century horror show built in a lovely Italian garden.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Architectureal fantasy quarter of Rome.

An alchemist's "magic door" stands in the middle of a Roman park.

A Belle Epoque bordello turned into a themed love hotel.

The world's largest collection of ships in bottles.

The world's oldest surviving music hall was also once a freakshow.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

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

Sometimes an island, sometimes a rocky outcropping connected to the world by a tiny suspension bridge.

The UK's oldest theme park slowly slips away.

The Last Home of an Executed King.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

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

Seat of the Duke and Duchess of Devonshire for centuries.

Luxurious hotel designed to stir the imagination of its many visitors.

The oldest inn in England served brew to the crusaders.

A petite castle folly in the English countryside.