It’s not hard to believe that the surreal, boulder-strewn desert of Joshua Tree National Park, named after the spindly trees that dot the landscape, could be home to aliens. It looks like it could have been created on another planet, in fact. UFO hunters come to seek an alien base rumoured to be hidden somewhere beneath the desert ground. Giant Rock, an enormous freestanding boulder, has been a gathering spot for people scouring the skies for spacecraft since the 1950s and there's an annual UFO convention, Contact in the Desert, in nearby Indian Wells.
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