In the event that you have not yet put Joshua Tree on your list of places to visit (preferably while you can still scramble around a little), I provide today a few more visuals to try and convince you.
It's a wondrous place. Morning, noon, and night. When you visit, get a place with a good spot for sitting out at night to gaze up at the stars. The night sky in Joshua Tree is special. It's soft, dark, velvety. Just the opposite of the landscape during the daytime.