San Diego Zoo’s $70 million Africa Rocks renovation and expansion project, currently underway and slated for completion in early summer 2017, will include new plazas and viewing areas spotlighting animals including baboons, crocodiles and penguins. Rendering courtesy of San Diego Zoo

San Diego Zoo’s $70 million Africa Rocks renovation and expansion project, currently underway and slated for completion in early summer 2017, will include new plazas and viewing areas spotlighting animals including baboons, crocodiles and penguins. Rendering courtesy of San Diego Zoo

— A 2013 study by the National University System Institute for Policy Research estimated that San Diego County has an average of 114,000 visitors on a typical summer day — 45 percent higher than the number taking in theme parks, beaches and other attractions outside of that season...

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