This abandoned subway station can still be seen on regular commuter trips.

This forlorn park is the result of a failed investment turned tax dodge.

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

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

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

An abandoned asylum where patients have been forgotten but their possessions remain.

A historic recreation of the golden age of the Erie Canal, abandoned for some time, slowly being restored.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

A mysterious, abandoned building rotting on the Brooklyn waterfront.

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

The quarry was abandoned over 100 years ago, after a massive ammunition explosion ended in tragedy.

The final resting place of some of Staten Island's earliest settlers and their descendants.