Front of card: Camels; Gorilla; Giraffe; Grizzly Bears; Jaguar; African Lioness With Cubs. Back of card: The San Diego Zoological Gardens ranks as one of the four largest in America. The Zoo covers an area of over 200 acres amid a setting of semi-tropical gardens. It contains one of the finest collections in the world. The finest pair of mountain gorillas in captivity are a chief attraction.