A playground the size of a city block is a modernist monument to civic values and public housing.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

A well-worn marker in a forgotten alleyway is all that remains of what had been one of Manhattan's most beautiful buildings.

The oldest Methodist church in the United States has been spreading the good news for over two centuries.

The greatest real estate coup of all time.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

The first piece of public art dedicated to LGBT rights.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

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

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

New York City's first Modernist house.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

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

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

A staggering collection of photographs depicting medical, social, and historical change.

Once a ferry dock, radio transmitter, and now a new Greenpoint park.

For almost a century, this East Village newsstand has served egg creams to beats, hippies, punks, and everything in between.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.