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

This classic restaurant features a gorgeous mirror-clad room.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

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

An eerie, derelict amusement park in Berlin.

This historical theme park celebrates all things noodle.

On Japan's Tashirojima Island, cats are king.

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

If Hello Kitty were Mickey Mouse, this would be Disneyland.

A taste of the macabre Tokyo's ritzy shopping district.

Cabaret where the show girls are all androids, and the patrons couldn't be more pleased.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

This collection of grinning ephemera has grown from basement to Brooklyn.

A semi-scholarly approach to sex.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

A no-frills cinephile haven known for showing offbeat, underseen films.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

A B&B on a Victorian lighthouse station in San Francisco Bay.

This infamous prison has a store where you can buy goods crafted by incarcerated people.

9,000 square feet of vintage and modern mechanical toys, dioramas & sideshow curiosities.