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.

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

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

This house was the subject of an Edward Hopper painting, which in turn helped inspire the design of the Bates house in Alfred Hitchcock's 'Psycho.'

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

Homemade rockets, dinosaurs, and robots make this New York small business much more than a furniture store.

Now the final resting place of prominent artists and musicians, it was originally founded to separate the rich from the poor in death.

Protecting the future of some of the rarest and most misunderstood mammals of North America.

The largest known open fault in the United States is basically a giant natural refrigerator.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

A castle inspired by medieval architecture is hidden in the woods of Connecticut.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

"Gnome Chomsky" was once the largest gnome in the world, but is now simply tall for his kind.

This sprawling woodland estate was the brainchild of iconic American industrial designer Russel Wright.

The Brigadier General was so afraid of being buried alive that he had a buzzer installed in his mausoleum, just in case he woke up.

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

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

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