San Fran is a cool place, just stay off the buses at all times. Its like Big Trouble in Little China on those buses and you wont leave with your wallet. Alcatraz is really cool, exploring that whole area is an awesome experience. When I was a kid growing up in the Bay Area our school was teaching us about the Spanish Missions and we went on like 5 field trips to different ones all over the area, they are pretty cool… well they were when I was in 4th grade anyways.