The remains of what was once the world's steepest passenger funicular.

Buffalo's abandoned concrete grain elevators are getting a second life.

An abandoned tuberculosis hospital moulders on into an uncertain future.

A retired subway car stands alone in a field in the middle of Queens.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

This once sprawling resort now sits abandoned, filled with graffiti and vibrant colors from an era long passed.

A beautiful, historic location open to the public.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

This abandoned ironworks was once the most important military supplier in America.

This vacant church in the Financial District was once the heart of New York's first Syrian immigrant community.

This abandoned factory on the Hudson River once churned out a million bricks a week.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

This old cement mine has been used as everything from a mushroom farm to a recording studio.

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

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

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

I fought the law and the precinct caved in.

One of only two remaining Victorian-era greenhouses in New York.

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

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

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

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.