In Death Valley, there are rocks that move by themselves across the dry plains. They're called the Sliding Rocks of Racetrack Playa, or sometimes the Sailing Rocks. You think the website is an unauthenticated, unprofessional hoax? Here is the author's doctoral thesis on the subject.
The theories about what moves these rocks are all a little odd. Wind blows them? The mud flakes expand and contract moving the rocks? Magnetic fields under the surface?
And while we're on the topic of crazy desert features, have you heard of the Door to Hell, also known as the Burning Gates? Located in Turkmenistan, this cavern is full of burning gas and looks like a lake of fire.
The Soviets were mining for natural gas and found a rich pocket, but then the mine caved in. To prevent major gas leakage, some genius set it on fire, and it's been burning now for 35 years. Meanwhile, the Wall Street Journal reports that Turkmenistan is the Next Big Thing when it comes to business of extraction.
The desert is full of mysteries. Like the Nazca lines in Peru, for example. Drawn by ancient people, these huge pictures in the ground are only visible from the sky.
Or the Devil's Hole pup fish, an ancient species that only exists in a cavern in the middle of Death Valley. This little guy has been around for 22,000 years but now is endangered. A desert fish.