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

Secluded amid upstate New York’s Adirondack Mountains lies this subterranean emblem of a nation on the brink of nuclear war. And it's for sale.

"A hideous albatross in the Hudson River Valley."

Steepest flood safety railway in the entire world.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

A once grand hotel is being retaken by the wilderness it once capitalized on.

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

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Oldest existing wire suspension bridge in the United States.

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

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

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

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

Celebrating the greatest pugilists the world has ever known.

A collection of unique outdoor sculptures surounded by the beauty of nature.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

Soaring over the Niagara Whirlpool since 1916.

Genesis of modern hydroelectric power.

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

Toxic waste disaster that founded the Superfund program.

A natural gas leak provides a flickering flame beneath a waterfall.

Ruins of a once-prized railroad station in New York.

Home on the Hillside, and home of the first breakfast cereal.