I think there is more than enough to do in San Francisco (Oakland, Berkeley, Marin) to fill a month, as nice (or not) as those other places might be.

Things to Do and Places to Go - San Francisco
SF things to do
10 Things to Do in San Francisco Before You Die
https://www.flyertalk.com/forum/san-...d-threads.html
Heading to San Francisco Sept 2 - 7 (for the first time). What to check out?
1st time trip...How much can I pack in?
https://www.flyertalk.com/forum/san-francisco/1169692-first-sf-i-need-advice-what-do-1-5-days.html

Sunny side of the Bay:
Anything to do in Oakland??

Public Transit: Need SF Hotel & Public Transportation advice