Gorilla World attempts to simulate the rainforest of central Africa. It opened in 1978 as one of the first, natural gorilla exhibits in the country. The main enclosure is about a 30,000 square foot, forest habitat with many tropical plants, waterfalls, meadows, logs and vines for zoo's famous western lowland gorillas to encounter. The zoo also holds the record for having the most gorilla births in one year; six, in 1996. There are also exhibits for colobus monkeys and crowned guenons.