if you're going to San Fran, be sure to go to Alcatraz. We had to buy tickets 2 days before as it sells out quickly. Amazing tour.......great boat ride, and so interesting. I hope they fix it just so more people can see it...it's deteriorating quickly. What a life they must have had...guards living with their families on the island. Tour is basically self-regulated, but be sure to get the headset, and follow it.