San Diego Zoo Safari Park, USA

With an estimated area of about 1,800 acres, the San Diego Zoo Safari Park is one of the largest zoological parks in the world. The park is home to more than 3,500 animals from 400 different species, and it is organized as open-range habitats. The park is famous for its success in breeding programs for the rhino and the condor, and it is the global leader in wildlife conservation through the San Diego Zoo Wildlife Alliance, which works toward raising awareness of ecotourism and sustainability.