Monument to a forgotten NYC disaster that claimed the lives of 1,000.

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

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

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.

This small, hidden cove is home to abandoned boats.

This seemingly unremarkable boulder is said to bear the hoofprint of the devil himself.

The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

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

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

A heartbreaking monument showing the last morning in the life of Jane Griffith.

A burial ground of rusting metal grave markers.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

Site of the first pathological and bacteriological research facility in the United States.

Collect holy water from a Bronx grotto.

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

Brooklyn's Barkaloo Cemetery is the resting place of a scant two bodies.

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

Once considered the height of medical modernity, this structure is now the oldest remaining component of Roosevelt Hospital.

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

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."

There are owls with glowing eyes in Herald Square.

A former connection to City Island, it has been abandoned since the 1930s.

Historical figures from New York City's Catholic community reside in Midtown.

Harlem park dedicated to compulsive hoarders killed by their own junk.