Oakland Zoo, in the past known as the Knowland Zoo, is a 100-acre zoo located in southeastern Oakland, California, United States. Most of its animals are kept in relatively "natural" habitats, and expanded natural habitats are planned. The Wayne and Gladys Valley Children's Zoo which opened in 2005 is a good example of the zoo's plans for the future, with interactive exhibits, state of the art animal housing facilities and children's play areas.