The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.

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

The lost town of Neversink, sunk by New York City.

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

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

This whimsically unique butterfly farm focuses solely on creating habitats for the gentle insects.

Astonishing collection of helmets, scientific instruments, and medical models.

The rustic think-space of famed naturalist John Burroughs stands exactly as he left it.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

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

The remains of what was once the world's steepest passenger funicular.

A historic recreation of the golden age of the Erie Canal, abandoned for some time, slowly being restored.

The floor-to-ceiling collection in an old factory is a unique alternative to stuffy galleries.

This throwback amusement park is home to rides and unique storybook figures from the past.

Museum dedicated to the struggles of the disabled.

The great American road trip, but smaller.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

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

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

An eccentric playboy's astounding natural history collection.

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

A sewing machine tycoon built this miniature castle for the people and to beautify a lakeshore.

The attic and basement house two museums stuffed with oddities like swallowed spoon handles and a shrunken head.

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.