An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

A crumbling hospital from the 1850s on Roosevelt Island.

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

Toxic waste disaster that founded the Superfund program.

Abandoned power station once home to a squatter community, now being developed into an arts center.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

From scholastic to sepulchral - now under reconstruction.

This once luxurious Catskills resort is now a haunting ruin.

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

A long abandoned hospital building on the outskirts of NYC.

I fought the law and the precinct caved in.

The saddest little diner in New York.

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.

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

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

A former seaside jewel built for the everyman is now simply a neglected art deco fortress.

Once America's longest-manned military fort, now an abandoned hulk.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

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