Unrepaired walls from a 1920 anarchist bomb attack.

Make a tough dinner decision: Octopus wasabi roulette or bull penis?

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

A collection of fanzines, recordings, and documents detailing the rise and influence of the feminist punk movement.

This iconic tattoo shop has its own onsite museum with artifacts from the early history of modern body art.

A living archive of urban activism and space reclaimed.

This abandoned subway station can still be seen on regular commuter trips.

This semi-hidden Manhattan restaurant is based out of a loading dock.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

During the holidays, a vintage subway train whisks New Yorkers back in time.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

Unique antiquarian shop specializing in globes, maps, and prints.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

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

Nikola Tesla's former home contains an homage hidden from plain sight.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

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

Become a prohibition rebel.

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

A hip bar decorated with walls of golden skulls.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

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

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