Hundreds of drawings left by the land's previous inhabitants remain mysterious.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

This strangely vacant Western amusement seems to be an empty tribute to residents of Lucerne Valley.

Since World War II people have been decorating this stretch of the Yuma desert with signatures arranged out of rocks.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

Where there's quartz, there must be gold. Thus is the story of the mines of Julian, and the titillating times of the Gold Rush.

A UFO scrapyard in the California desert.

This historic tower in the California desert promises visitors a "vortex of good vibes".

A remote desert lookout offers unparalleled views of the California badlands for those who brave the trek.

A monument to a one-legged kidnapper, horse thief, and charlatan asks visitors to throw rocks in a pile.

Along a California highway is a kind of Jurassic Park made of metal.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

This giant spider sculpture made from the iconic car is one giant visual pun.

The so-called "Bridge of Thighs" in Palm Springs allows nudists to discreetly cross the road.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

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

In one of the hottest parts of the Mojave Desert, shallow bedrock forces the typically dry Mojave River to the surface in this canyon, providing a vital oasis for humans and wildlife.

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.

This giant temperature attraction created some giant electric bills.

This sculpture garden in Death Valley makes you feel like you've slipped into some alternate reality.

This secluded date farm can be reached only by following a bumpy, single-lane desert road.

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

Water of undetermined depth has attracted rare fish and cult leaders alike.

Marta Becket's hand-painted theater in the desert.