I took this picture of the Sonoran Desert on the road heading back from a meeting in Arizona. At the time, my boss bemusedly wondered if I could get any good shots while the car was moving... I'll leave that up to you to decide.
Those tall green spikes seen in clusters around the right base of the hill are Saguaro cacti. Apparently, they only grow wild in the Sonoran Desert, and take a long time to grow. Estimates have these cacti living for 150-200 years, and a 10 year old cactus is only 1.5 inches tall! If you want to learn more about the Sonoran Desert and the research that is taking place there, see this really neat website.