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

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

Spike Lee's provocative film is officially honored right where it was made, the first time a work of art was used as a secondary street name.

Failed state-supported institution meant to rehabilitate students with intellectual disabilities.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

Final resting place for the Triangle Shirtwaist fire’s unidentified victims.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

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

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

Two community gardens under the elevated subway lines on a very busy commercial strip in Bushwick.

A mysterious, abandoned building rotting on the Brooklyn waterfront.

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.

This mysterious marker puzzles pedestrians and infuriates geographers.

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

Where the four original members of the Ramones hung out and revolutionized punk rock.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

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

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

One kilometer of thick brass rod laid out before your eyes.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

An abandoned subway tunnel that could have reinvigorated Staten Island still lies somewhere beneath this Brooklyn park.

A one-ton statue of Steve Rogers beautifies the entry to a Brooklyn Bed, Bath & Beyond.