It's amazing what floorplans you can turn up when you do the research in Your Story. When I did the Twin Cities setting, I got a whole floor plan for an abandoned hospital, which I turned into one of my main antagonist hideouts. It's amazing.
Also, I gotta second Valarian on the Supernatural Adventures book. When I picked it up, the first thing I thought was how well this would translate to the Dresden Files RPG. Actually, if I were to be honest, I'd rather run a game of Supernatural in the Dresden Files RPG than I would in the Supernatural RPG, but that's mainly because they use Cortex Classic. With a Cortex Plus implementation, I'd actually go either way on it.