A hidden "place of interment for gentlemen."

Plot your trip through the city on the sidewalk.

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.

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.

Prove you deserve to be fed by Kenny Shopsin.

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

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

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

Ride the subways of yesteryear.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

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

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

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

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

A celebration of capitalism in Midtown.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

One of only two commuter aerial tramways in the United States.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

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