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

Sniff the Titan Arum's rotting flesh.

Detailed facade of a brownstone in Boerum Hill.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

Avoid gangster interaction while window-shopping.

The site of a tragic massacre that spawned a multimedia franchise.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

A bit of retro transportation flair preserved in the world's largest department store.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Cryptic messages embedded in the New York City sidewalk.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

Nondescript elevator doors open to reveal a stunning, surreal world.

An abandoned asylum where patients have been forgotten but their possessions remain.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

One man's swirling six-acre monument of stone.

Bowl in splendor, if you're lucky.

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

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."