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

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

This classic restaurant features a gorgeous mirror-clad room.

A surreal museum of extraordinary industrial objects.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

“Invented in Key West, Perfected in Brooklyn."

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.

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.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A semi-scholarly approach to sex.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

New York's oldest and possibly grandest keeper of books.

A whimsical, but often overlooked clock in Park Avenue.

Unrepaired walls from a 1920 anarchist bomb attack.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

Eighty million natural history specimens call this gargantuan museum home.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

The curios of pharmacist and collector Henry Wellcome.