San Diego Zoo

The San Diego Zoo is a zoo in San Diego, California, housing over 12,000 animals of more than 680 species and subspecies on 100 acres (40 ha) of Balboa Park. The zoo is the most visited in the United States. Travelers have cited it as one of the best zoos in the world. The zoo was a pioneer in the concept of open-air, cage-less exhibits that recreate natural animal habitats. It sits on land leased from the City of San Diego.