Avoid gangster interaction while window-shopping.

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

Prove you deserve to be fed by Kenny Shopsin.

A hidden "place of interment for gentlemen."

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

Lie in a hammock where George Washington stood.

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

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

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

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

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

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

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

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

A legendary speakeasy bookstore returns from the brink.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

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

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

New York City's smallest piece of private property.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

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