Mentioned by San Diego 2 days itinerary
48 Hours in San Diego: Highlights Itinerary for 2 Days
"For example, if you love animals or are traveling with kids, San Diego Zoo is in the park. It’s huge with many open areas for the animals, and also margaritas and craft beer for the adults. If you just love parks or nature, you can stroll through the park itself or one of its many gardens- including a rose garden, a Japanese garden, and a botanical garden. Note that some gardens (like the last two) close at night."