 In the 1900s, the facility began to spread out over the entire park, featuring a variety of animals such as monkeys, hoofstock, bears, and big cats.In 1929, the Menagerie building was converted to a birdhouse; this was followed by the opening of an elephant barn in 1930 (which would later be converted to the "Tropical America" building).In the 1930s, a new sea lion pool was constructed.