A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

A hidden "place of interment for gentlemen."

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

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Walk over a 150 year old manhole.

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

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

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

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

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

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

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

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

From scholastic to sepulchral - now under reconstruction.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

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

An unassuming secret door once led to a legendary watering hole.

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

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

A celebration of capitalism in Midtown.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Peek through the gates at this oasis from the city, full of Old English charm.