This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

The only theatre in the world constructed specifically for sound movement.

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

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

A hands-on traveling collection of the innovative devices of yesteryear.

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

Medicinal spa created with the discharge from a geothermal energy plant.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Continuing the tradition of the dime museum in style.

Started as a kitchen garden, now the second largest botanical garden in the world.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A bizarre house filled with an astounding array of collections.

A magical place that lets you play in and explore the world of Studio Ghibli.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

The magic of Spanish aviation housed under one roof.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A lush indoor jungle fills this bustling Madrid transportation hub.

This former factory has been transformed into a technicolor wonderland, where dozens of local artists have collaborated to create a real choose-your-own-adventure experience.

A large collection of steam engines, organs, and fairground attractions.

The eclectic observatory castle of a 19th-century astronomer and explorer.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

Egyptian Revival movie palace abandoned for decades and restored in 2013.