Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

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

All that remains of one of the Civil War's more deadly POW camps is a simple flagstone.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

The first evidence of some of the Earth's earliest life was found in this fossilized undersea grotto.

This lovely little pond is named after the hundreds of soldiers' corpses that were rolled into the waters during the French-Indian War.

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

Not even a series of devastating fires could keep this odd castle in upstate New York from bouncing back.

This abandoned cemetery is crumbling into ruin, exposing the artifacts and bodies buried there.

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

The site of William McKinley's tragic assassination is only marked by an underwhelming boulder.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

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

This small road tunnel is the only place where you can cross beneath the Erie Canal.

This mouldering abandoned mental hospital was once a center for progressive healing.

This forlorn park is the result of a failed investment turned tax dodge.

This locally-famous crevasse in New York State is icy all year round.

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

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

This abandoned ironworks was once the most important military supplier in America.

An enormous cat made of recycled wood scraps.