Play in San Francisco in Cruise mode with a Ford Mustang Cruiser. When the cruise starts, you will often start with a place where there is a cop on your left and the sea. Drive straight ahead and take the first left turn. Only drive a few more yards. To your right you should see a small opening to a building near a little pond. Get in there. Once inside, there should be a way up. Go there to see a slanted building that you can drive on. Drive on it by going on the edge in the direction from where you entered the top, with a little speed. You should be on top of the building.