Cool things to do this weekend around San Francisco for B-day surprise?

I need some help finding something for Saturday Nov. 3rd Its my BF's birthday and looking for new ideas.

Cools things we have already done:

Chartered sailboat for bay cruise
Safari West in Santa Rosa
Concerts
Plays
Wine tasting trips

We like nature/photography/music etc....

I thought of trying Teatro Teanzinni, but the menu right now is not inspiring....

Have you done Beach Blanket Babylon? or Color Purple? Kevin Nealon is at Cobbs Comedy Club?
Take a hike through tenessee valley in Mill Valley, and have lunch at Sam's in TIburon.

Walking tour of chinatown or north beach (meal included)

Africa U.S.A. up north of Vallejo? A hike and Picnic on Angel Island? Dinner at the Cliff-house? Great America amusement park?

have you been to see muir woods just north of san francisco? It's beautiful there!

Personally, I like the Russian River Valley this time of year. I know you've done the wine tasting thing; but for me, RRV is more about the scenery.

I'd drive up Route 1 to Guerneville (it takes longer this way, but the views are worth it). Along the way you'll see ocean, redwoods, a different climate every ten minutes. Then grab lunch in Guerneville and take it with you down along the river. It's quiet, rustic nature at her best.

Then head south, maybe stopping in Healdburg for some gentrified window shopping and maybe a drink. Last, have dinner at the new El Dorado Kitchen in Sonoma.