Eclectic architecture in the woods of New York.

A posh members-only club with a literally dramatic history.

This once-private estate is now a dreamy, meditative garden that's open to the public.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

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

Why have you never heard of the second most popular tourist site in New York?

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.

A former connection to City Island, it has been abandoned since the 1930s.

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

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

A mysterious echo seems to defy the laws of acoustics.

Town full of spiritualists, some of whom are mediums, is still in full swing after 130 years.

The notorious headquarters of a corrupt political machine.

In the middle of suburban Staten Island, a nearly 150-year-old bakery is preserving the art of a disappearing New York treat.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

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

Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

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

A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

An unrealized dream to wirelessly electrify the entire Earth.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

A winding, cliffside stretch of road overlooking the Delaware River.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.