Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

The mysterious image is believed to show Edward Hyde, 3rd Earl of Clarendon, in a beautiful blue dress.

A well-worn marker in a forgotten alleyway is all that remains of what had been one of Manhattan's most beautiful buildings.

A mass grave for victims of one of the city’s worst fires.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

This recipe is set in stone.

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

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

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

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

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.

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

Risk arrest while partying to fund art.

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

Church in Manhattan holds the bloody sock of Padre Pio, among with many other unusual relics.

Waterway populated with abandoned projects, including a submarine.

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

A museum collection honoring the long history of the FDNY is held in a disused Manhattan fire house.

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

Records of the dead describe the myriad odd ways people used to die.