Having time to spend in San Francisco? Grab a Bart (commuter train) at the airport and head downtown. Take a nice walk to the north beach area where Pier 39 and other nice places are located. Check out the monk seals and all other strange creatures hanging out there. Lots of stores and activities will inspire you and get your time killed easily. San Francisco has not a good weather reputation, but I never had bad weather and so you can see on my photos.