A young woman's senseless murder led to the controversial psychological theory of the "bystander effect."

A B.Y.O.B. Mexican cantina lives inside one of the last tortilla factories in Brooklyn.

A New York warehouse filled with an enormous amount of goods saved from the landfills and donated for creative use.

New York City's only radical feminist independent bookstore.

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

A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

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

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

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

Collect holy water from a Bronx grotto.

In the middle of suburban Staten Island, a nearly 150-year-old bakery is preserving the art of a disappearing New York treat.

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

Obscure and obsolete publications are given new life as works of art.

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

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

One of the oldest Jewish cemeteries in the city, it is now overgrown with an urban forest.

The 28-foot granite map plots the locations of 40 theaters in New York City.

Underground vaults of a former brewery beneath Brooklyn's Crown Heights are now used to ripen cheese.

This interactive gallery makes you feel like you've stepped into a fantasy world filled with whimsical monsters.

The highest point on the island known for buildings that touch the sky.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.