The secret city built by the Manhattan Project.

Home of an evil witch famous within southern folklore.

This Gold Rush ghost town was once the subject of a territorial dispute between California and Nevada.

US-50 in Nevada is known as "the Loneliest Road in America," but this earlier iteration of the route is even lonelier.

This former open-pit manganese mine is now a massive graffiti canvas.

A hidden slot canyon in the southern Nevada desert makes an unexpected oasis and scenic hike.

A private Las Vegas horse ranch adorned with whimsical artwork.

Potential high level nuclear waste storage site for the next 10,000 years and beyond.

This tiny cluster of abandoned buildings looks like the future of the ghost town - today!

This famous Nevada gold mine, once a hotbed of Wild West shenanigans, is now open for tours.

This vintage animatronics show is the Vegas version of a walk through the woods.

Nicknamed the "Grand Canyon of the North," this open-pit mine in Minnesota has a much shorter history.

A mine in the Sierra Nevada that produced nothing but barren quartz.

This quirky Arkansas wax museum does not shy away from the macabre and the grotesque.

Everything in this miniature world was handmade from matches, paperclips, wires, tin cans, and other everyday objects.

Crystal hunters can dig for their own stones at this DIY mine in Arkansas’ quartz belt.

North Carolina's finest examples of Native American pictographs have survived for 5,000 years.

An art instillation for the sake of "raising vibrations."

An idyllic mineral hot springs facility with a more-than checkered past.

Naturally carbonated water fills the mineral baths at this 19th-century California resort.

In eastern Oregon, two mineral hot springs sit along the Malheur river.

A lava tube cooled to form this long tunnel that stays chilly even at the height of summer.

A Japanese colonial-era hot springs hotel that has transformed into an art museum.

The abandoned bathhouse is all that remains of the hot springs considered Florida's original tourist attraction.