A community farm in the midst of the Brooklyn concrete.

If it hadn't been caught in time, a flaw in the design of this Manhattan skyscraper could have led to its collapse.

This outdoor gallery of sculptures along the East River was once a landfill.

100 massive sculptures in the Hudson River Valley.

What’s a sure fire way to end up in jail in New York in the 1920s? Peddling bad moonshine.

Once a flowing stream and where the USS Monitor, the world's first ironclad, was built and launched.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

This humble historic facade hides a history of boozing and the gentlemanly sport of rat-fighting.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

Ride the subways of yesteryear.

This giant boulder is sandwiched between apartment complexes in upper Manhattan.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A memorial to the first person killed by a motor vehicle in the Western Hemisphere.

For 20 years, local pumpkins have met their fate on the iron fence surrounding this Cobble Hill home.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

The factory for the popular Dumbo location, the Greenpoint shop is a quiet gem.

The engineering feat of the Panama Canal was possible in small part thanks to materials developed in this humble Red Hook foundry.