It was built in the mid-1970s. The building was home to one male hippo named Moe. Moe had a 30,000-gallon pool. Moe shared the building with a breeding pair of black-footed penguins. On the outside of the building, there were exhibits for the zoo's Siamese crocodiles, Hillary and Bill. The crocodiles were moved to the Small Animal Building in 2003. Moe moved to the Rio Grande Zoo in Albuquerque, New Mexico. The Hippo Building was torn down a couple of years later for the construction of the new carousel. In 1981, for the Hogle Zoo's fiftieth anniversary, the Animal Giants Complex was built. The exhibit was built to house the zoo's elephants, Dari, Kali, Twiggy, Toni, and Toka, and the zoo's white rhinos, Princess and George. Naturalistic outdoor enclosures were not only built for the zoo's pachyderms but for ostriches and tortoises too. The Animal Giants Complex was renovated for Elephant Encounter which opened in 2005. Central Zone was in between Desert Canyon and the Great Apes Building. Central Zone was home to the zoo's Bactrian camels. During the summer of 2012, the Gobi, an arthritic male camel, was euthanized due to his great pain. He lived with another camel, named Mabel, who was then sent to the San Diego Zoo to be with other camels and so the zoo could start construction on the African Savanna exhibit. In the late 1980s, construction on Discoveryland began. Discoveryland was the first exhibit built at Hogle Zoo to resemble animals' natural habitats. The exhibit displayed animals of the Americas. The exhibit was constructed in the eastern part of the zoo. It was built in five phases. Discoveryland was torn down in order to build the zoo's, African Savanna. Woodland Edge  Woodland edge was the first phase of Discoveryland. Woodland Edge consisted of two naturalistic exhibits. One exhibit housed the zoo's bald eagles. Their names were Sam and Betsy. The other exhibit housed a bobcat. When construction on Rocky Shores started, some of the animals from the construction zone had to be moved to Discoveryland. The exhibits in Woodland Edge were renovated to house them. Two orphaned mountain lion siblings moved into where the bobcat used to be, and a family of endangered charcoal peccaries moved into where the bald eagles were.