The first pet cemetery in the United States.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

The site of a tragic massacre that spawned a multimedia franchise.

A historic lighthouse steeped in rumors of ghost and pirate stories.

This backwater graveyard in the Hamptons became a trendy burial spot and posthumous status symbol for famous artists.

A mysterious air force base built to resemble a Long Island fishing village.

To avoid the demolition costs this abandoned drawbridge was simply left in the up position.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

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

This forgotten graveyard in rural New York State once served a pioneering hospital.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

A formerly abandoned mental institute, now back in business.