One of the last Jazz Age "Wonder Theaters" in New York City.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

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

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

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

Cryptic messages embedded in the New York City sidewalk.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

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

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

Bowl in splendor, if you're lucky.

Wine bottle sculpture with a ship's stateroom inside.

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

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."

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

Prove you deserve to be fed by Kenny Shopsin.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

A very classy 1920s-era bar right in Grand Central Station.

Slyly buy a shake in the Parker Meridien lobby.

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

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

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

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

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