Sandwiched around my Alcatraz Sharkfest swim, Donna and I visited San Francisco and the Napa and Sonoma valleys. What an unbelievable and unforgettable experience. We arrived in San Francisco on Thursday morning and drove to our hotel, the Argonaut, in the Fisherman’s Wharf section of town, adjacent to Aquatics Park, where the swim ended. The Wharf is really touristy, like a beach boardwalk—shops selling tee-shirts and souvenirs, bike rentals, chain restaurants and entertainment venues like wax museums. And bajillions of tourists. The sidewalks were packed from 9 in the morning to late at night. But the location was excellent not only because of its proximity to the race but because we were close to so many things we wanted to see. On Friday, the day before my swim, we toured Alcatraz. The watchtowers and ruins of buildings reminded me of the pictures I have seen of POW camps or Auschwitz. The conditions looked sub-hum...