See 3,700 animals from 800 different species at San Diego Zoo, spread across the lush grounds of the 1,200-acre (485-hectare) Balboa Park. Save time on the day by buying tickets in advance, so you can start exploring bioclimatic zones and exhibits straight away. Enjoy free shows and presentations, or upgrade to include the 4D theater or carousel rides. Combine your trip with a visit to San Diego Safari Park for the ultimate day for wildlife lovers.