The San Antonio Zoo is an Association of Zoos and Aquariums-accredited zoo in Midtown San Antonio, Texas, United States. It is located in the city's Brackenridge Park. The 35acre zoo has a collection of over 3,500 animals representing 750 species. The zoo's annual attendance exceeds 1,000,000. It also runs non-animal attractions, such as the narrow gauge San Antonio Zoo Eagle train ride, which first opened in 1956 and utilizes three Chance Rides C.P. Huntington locomotives.The Richard Friedrich Aquarium was opened in 1948. It was the only aquarium in the city until SeaWorld San Antonio was opened in 1988.HistoryWhat is now known as the San Antonio Zoo began in 1914 when Colonel George Washington Brackenridge, one of the city's leading citizens, placed bison, deer, monkeys, African lions, and bears on land he had deeded to the city. The land became Brackenridge Park and Golf Course.