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

An unconventional space for art and science housed in a massive old warehouse.

An eccentric playboy's astounding natural history collection.

A room hidden behind a swinging shelf in the children's section.

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

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

The real-life site of Ichabod Crane's infamous gourd attack.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

A peaceful international sculpture garden in upstate New York.

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

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

Waterway populated with abandoned projects, including a submarine.

Quite possibly the last cross all humans will ever see.

An old dining hall now serves up ghost stories for lusty locals.

This was one of the first (and last) university-built and operated nuclear reactors.

Serving Central Asian breads that range from cracker-crisp to warm and fluffy, this bakery brings Bukhara to Queens.

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

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

This small-town Connecticut restaurant gives each diner a free book from its vast library.

This boulder with a 200-word legal dedication to God has remained hidden in the woods for over 150 years.

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

A meditative space out of a fantasy story.

A 13,000-year-old mastodon skeleton was found during the construction of a 19th-century New York mill.

A rock outcropping left by a glacier that made itself useful throughout the centuries.