It was 12 years ago, but my first visit to Joshua Tree National Park is still fresh in my memorynot least because I turned it into a photo-tour here on About.com. Today's solstice is not the best time to visit the park, because the sun is at its most brutal. The Mojave Desert is as deadly as it ever was. Better is early April, when I took the photos in the tour.
Joshua tree at Joshua Tree Geology Guide photo