This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

A former major munitions plant that has been converted into a sprawling art space.

The narrowest house in America is seven feet of pure spite.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

A museum documents the development of the invention that tamed the Wild West.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

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

Abandoned rock quarry now a haven for mountain bikers and hikers.

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.

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

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Come for the gun-toting hillbilly madman, stay for the ice-cream loving basketball bears.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

Site of an escape, ten murders, and some scalpings.

The summer home and later final residence of acclaimed American sculptor Augustus Saint-Gaudens.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

The only visible piece of San Francisco's most famous shipwreck.

Haunting and beautiful trees, doomed to die.

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.

The huge granite obelisk that towers over a small California town.

Historic Hull Street was actually the first street with a proper name in the Boston area.