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

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

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

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

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

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

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

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

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

A living archive of urban activism and space reclaimed.

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."

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

An unrealized dream to wirelessly electrify the entire Earth.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

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

The oldest surviving synagogue in New York City is now a soaring art space.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

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

Unlock the secrets of the conjuring arts.

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

The loneliest island in New York.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.