The mass grave of a heroic Revolutionary War regiment sits below an empty lot near the Gowanus Canal.

Historic Greenpoint theater turned roller disco, then chain pharmacy, and now Sweetgreen.

Known as the "Forgotten City" it was home to industry, riots, artists, squatters, and to one of the largest single disaster fires in New York City.

This small and serene place for quiet reflection on Staten Island was built in China based on the gardens of the Ming Dynasty.

This small road tunnel is the only place where you can cross beneath the Erie Canal.

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

An unconventional space for art and science housed in a massive old warehouse.

A cargo of beautiful music.

This translucent sculpture represents a quintessential component of New York City's skyline.

The Underground Railroad passed right through this historic Brooklyn Heights church.

Red frames showcase remnants of one of New York's original subway stations.

Once a popular watering hole among longshoremen and shipyard workers, this neighborhood treasure spans more than 100 years of Red Hook history.

The home of aviation trailblazers, in a remote corner of the big city.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

Take in a rare, face-to-face glimpse of Lady Liberty at this tucked away Red Hook park.

The gilded vestiges of a sterling department store can still be found in a Brooklyn shopping center.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

This 220-year-old house is a reminder of New York City's Dutch past.

Waterway populated with abandoned projects, including a submarine.

The oldest continuously inhabited street in America.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

A decommissioned military complex that's now a modern industrial park.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.