We've got only two days in SD/La Jolla and the main thing we're interested in doing is some of the trails, seeing all that great scenery, that sort of thing. I know that the SD zoo is famous. I'd love to get feedback from folks who know it well. Mainly, in so short a visit to the area, I'm wondering whether the zoo is worth a visit. I don't think I'm interested in the rest of Balboa Park. Thank you very much.