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

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

Traditional Appalachian dances such as the Georgia Rang Tang and the Shoo-Fly Swing are kept alive at this weekly event.

A wonderful display of arts and crafts handmade by local artisans in the Southern Appalachians.

A six-foot pair of socks hangs from a drawer of the world's largest bureau.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

A fire station-turned-church-turned-museum dedicated to the work of seminal light artist Dan Flavin.

The second-largest (of only two in the world) large particle collider is the underdog of experimental physics.

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

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

This abandoned factory on the Hudson River once churned out a million bricks a week.

Nine nice parcels of land along a flight path offer a quiet respite... until a plane soars overhead.

An exhibition space dedicated to American outsider art created between the 18th and 21st centuries.

A collection of fanzines, recordings, and documents detailing the rise and influence of the feminist punk movement.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

Carrying on the legacy of a short-lived experimental school tucked away in the mountains of North Carolina.

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

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

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

Abandoned power station once home to a squatter community, now being developed into an arts center.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

One of only two commuter aerial tramways in the United States.