A notorious punk house turned co-op.

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

A forsaken wonder in the middle of the East Side neighborhood.

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

Salute the leader of the proletariat.

An unrealized dream to wirelessly electrify the entire Earth.

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

This Central New York ghost town was once a prosperous railroad community.

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

Walk into the 19th century without leaving Brooklyn.

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

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

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

A once grand hotel is being retaken by the wilderness it once capitalized on.

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

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

An abandoned castle owned and ignored by Masons carries a cursed history.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

The abandoned coal loading dock is a canvas for unsanctioned art.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

The site of one of history's most indelible and horrific tragedies.

A long abandoned hospital building on the outskirts of NYC.

A World War II-era submarine is stuck in the mud in New Jersey.

The first and only carousel with a lineup entirely of insects.