This is something I have been wanting to do and the other day someone else was driving in downtown Phoenix, so I grabbed the camera and shot some buildings we passed. There are more I want to take, but this is kind of cool.
One thing I like is catching an old building reflected in the windows of a new building. I guess all the glass and reflections just make an interesting subject - to me at least.
This last one shows the sun reflecting off the building which is reflected in these windows.