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

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

Walk over a 150 year old manhole.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

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

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.

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.

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

A celebration of capitalism in Midtown.

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

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

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

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

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

New York City's smallest piece of private property.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Try not to get slimed in Tribeca.

New York's oldest magic store.

A terrific purveyor of natural history objects and curios.

The words of the neighborhood's most famous poets adorn four concrete walls.

Outposts of this restaurant chain were shaped like jaunty chapeaus.

A quirky collection of figurines backdropped by city views is hidden next to a popular restaurant in the Hollywood hills.