An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

A self-built castle made by a mysterious man.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Dramatic river bend surrounds a natural red-rocked pedestal.

Rippling sand dunes frozen in the Arizona rock.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

The eerie ruins of an isolated abandoned town nicknamed "the Widowmaker" for its deadly gold mine.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Center filled with hands-on displays served as a tribute to several astronauts with connections to the state.

What was once the largest NFL stadium.

This resort community was known as the "Black Eden of Michigan."

A museum dedicated to the dead and the tools used to usher them into the afterlife.

Large pioneer village showcasing life during boom times.

Located in a Civil War era building, this café is engrained with the spirit of Edgar Allen Poe.

A charming remnant of 19th-century fishing towns sits on Michigan’s Leelanau Peninsula.

The former home is said to be haunted by the ghosts of the beloved mayor and his wife who lived here.

Where the Model T was made and the assembly line was invented.

Glass and concrete building designed by Albert Kahn.

These sprawling mines once served as a source of plaster and today serve as a storage facility.

Detroit housing collective working to create an "environment for revolutionary change."

A crumbling mountain resort that looks like it was abandoned in an instant.