This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

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

A hidden "place of interment for gentlemen."

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

From scholastic to sepulchral - now under reconstruction.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

The oldest surviving synagogue in New York City is now a soaring art space.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

A very classy 1920s-era bar right in Grand Central Station.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

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

Become a prohibition rebel.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

This Cape Cod museum exhibits what it claims is the only authenticated pirate treasure in the world.

Series of storm drains connected to a dark urban legend.

Museum houses an impressive display of the origin and artistry from the now-quaint invention's history.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

Eighteen miniature death-scene dioramas.

This free, take-a-book shop seems like a trick but isn't.