I highly recommend Sun Xavier mission near Tucson--it can be gorgeous if the lighting is just right.
As for the boneyard, it is truly an amazing place to photograph and I was lucky enough to do so a few years ago when I knew the base commander there. If you don't know someone on base, I understand there are bus tours, but at the time, I was told the bus tours don't allow photography. That may have changed. You'll definitely need to check that out ahead of time.
If you can go north a few hours, Sedona has the gorgeous red rocks to photograph.
thanks Vived...much appreciated. I'm going to look into the boneyard and the sun xavier mission.
As someone else noted in a post after mine, the correct spelling of the mission is San Xavier. (The dark side of auto correct.) As for it being one big white building in the desert, it is. But I personally find it to be architecturally interesting and I like the fact that you can photograph it without clutter in the background. The good news is, is that it is been photographed many times and you can go online and see in advance if it is something you'd like to go visit in person. It's all personal preference.