Ride the subways of yesteryear.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

A notorious punk house turned co-op.

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

Cooks at this tiny takeout spot grind their rice flour in a stone mill each morning for perfect cheung fun.

Home to some of the last true noodle artisans in New York.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

This Russian bar-restaurant lies within a three-story underground bathhouse.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Visit the site of a subway powered by nothing more than air--and lots of it.

World's first "penitentiary," meant to be humane, drove men insane.

Beijing's version of Disneyland, completely abandoned, mostly destroyed.

A progressive LGBTQ hub offers dancing, HIV testing, art, and more.

This humble historic facade hides a history of boozing and the gentlemanly sport of rat-fighting.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

Snack on a partially gestated duck egg.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

A collaborative art project that transformed a neighborhood in NYC's Queens.

A hidey-hole sandwiched between cellphone, DVD, and jewelry stores features Tibetan delights.