Melbourne Zoo is Australia's oldest zoo and was modeled on London Zoo. The zoo was opened on 6 October 1862 at the Royal Park site in 55-acre (22 ha) on land donated by the City of Melbourne. Before this, animals were housed at the botanical gardens in Melbourne. Visitors can see historical cages, including the heritage listed Elephant House, which has been renovated and adapted for use for customers paying to sleep overnight in tents at the zoo in popular Roar and Snore evenings. These evenings allow the public to see some of the nocturnal animals at the zoo in evening guided tours by keepers. One of the most famous exhibits was Quinine the elephant. The zoo is set among flower gardens and picnic areas. Many of the animals are now organized in bioclimatic zones: African rainforest featuring gorillas, mandrills, pigmy hippos and parrots; Asian Rainforest with tigers and otters; and the Australian bush with koalas, kangaroos, emus, echidnas and endangered hairy-nosed wombats.