As a non-profit charitable organization the Phoenix Zoo provides experiences that inspire people and motivate them to care fo ... r the natural world. The Zoo has served more than 42 million people since opening in 1962 and more than 1.4 million people visit annually. Located on 125 acres in Phoenix's Papago Park, with 40 acres currently developed, the Zoo is home to more than 1,400 animals including more than 30 different endangered or threatened species from around the world. read more