A sewing machine tycoon built this miniature castle for the people and to beautify a lakeshore.

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

A formerly abandoned mental institute, now back in business.

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

An isolated beacon with a history of grisly murder and a view of some of literature's greatest inspirations.

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

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

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

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

One of the oldest Jewish cemeteries in the city, it is now overgrown with an urban forest.

19th century cemetery hidden in Brooklyn's Prospect Park.

A mysterious echo seems to defy the laws of acoustics.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

This natural rock "church" might not be a proper chapel but that doesn't mean it's not beautiful.

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

A castle built for love, and abandoned due to heartbreak.

Historical figures from New York City's Catholic community reside in Midtown.

Holding the most bodies of any cemetery in the United States.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

Relics given to a Manhattan church to avoid seizure by the Italian government.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

An unrealized dream to wirelessly electrify the entire Earth.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.