When the aircraft are approaching SFO from over the bay, they touchdown out of sight of the usual locations on the bay shore.  However, the old control tower provides a better perspective on these approaches.  While you are shooting through some pretty stout glass, you can get a good shot or two of the approaches.  A good example was the Lufthansa Airbus A380.  Watching it come in towards the land, drift across the shoreline and over the threshold before touching down a little way down the runway, you see things in a way that is not often achievable.  Since the tower will shortly be demolished, I doubt I will get something similar for a while.