The rocks in this arid basin leave trails of movement behind them.

A lawless town deep in Death Valley was famous for its riches and death rate.

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

A hard-to-reach oasis in a desolate corner of Death Valley National Park.

This desert oddity hides in plain sight thanks to a cartographic error and a desert explorer with a punny sense of humor.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

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

On the side of a remote mountain, a stone face bearing an inscription of mysterious origin.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

The longest continuous lava tube in Oregon.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

Explore 10 acres of environmental sculptures.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

One of the ghostly stops along Route 66.

No one's quite sure why there's a metal megaphone bolted on two rocks in the middle of the Mojave Desert.

The location of the last stand of Charles Manson's doomsday cult.

This impressive tunnel was dug entirely by hand over the course of 36 years.

One of the last free public hot springs is decorated with hippie art.

Eclectic collection of dark and macabre antiques.

A popular tourist cave with a dark past.

An abandoned cyanide mill is now a haunting magnet for graffiti and illegal parties.

Formerly frequented by Hollywood stars and now open for tours.

A new kind of theme park for adults off the Las Vegas Strip.