If you're going to San Francisco

Be sure to check out the cable cars. We spent a busy day riding the F line in a 1950s trolley car up to the Mission and Castro and then back down to Fisherman's Wharf. After some reviving seafood, we queued for about an hour to get the cable car up (and more scarily down) some impressively steep hills and back to Union Square.

 

So, today was tourism; tomorrow is shopping!