This is a church of some kind in downtown Phoenix. I feel bad that I didn't find out more about it, but I guess I wasn't planning on any pictures of it being any good. My favorite part about this image is the texture of the bulding and the dark lighting in the lower part.
This is a simple desaturation, with a very small amount of selective levels on the lower half to bring out the details a little more. Also a very small amount of unsharpen mask to bring out the fine details just a touch. I also have a channels version and a color version if anyone is interested.