What's the Best Free Day in San Francisco?

Most of the book, it seems, is reasonable as a date trip from l a or san francisco. So you've got goldengate park, a fabulous venue with dyong art museum,. A california academy of sciences in ther tremendous option that would fill at least half a day. And then i offer maybe four or five for every of the destinations - four or five alternate venues that ae kind of mixed and match options to fill a full ay in the destination.