The San Diego Zoo Safari Park, named the San Diego Wild Animal Park until 2010, is an 1,800 acre (730 ha) zoo in the San Pasqual Valley area of San Diego, California, near Escondido. It is one of the largest tourist attractions in San Diego County. The park houses a large array of wild and endangered animals including species from the continents of Africa, Asia, Europe, North and South America, and Australia. The park is in a semi-arid environment, and one of its most notable features is the Africa Tram which explores the expansive African exhibits. These free-range enclosures house such animals as antelopes, giraffes, buffalo, cranes, and rhinoceros. The park is also noted for its California condor breeding program, the most successful such program in the United States.