If you have time for only one zoo hit up the San Diego Safari
Torrey Pines State Reserve - a great place to hike near the ocean
La Jolla Cove - Sea Lions! and combine with this great restaurant for breakfast, Brockton Villa and make reservations!
Sunset Cliffs - an amazing view and great place for families to explore
Point Loma Tide Pools - a beautiful place to explore
Fort Rosecrans National Cemetery - a beautiful place to see a sunset and San Diego
Check out Old Town - check Google - most any restaurant will be great
Take a look at Julian CA. It is a little town up in the local mountains known for great apple pie, gift shops and quaint little restaurants. Be advised it will be cool up there and maybe snow on the ground. It’s a great little adventure if you have the time. You will also run into a lot of tourists.