The Duisburg Zoo was founded on 12 May 1934 by citizens of Duisburg. The zoo is known for its dolphinarium and the only one in Germany for a long time, the only one and the only breeding of koalas to date. In addition, numerous zoological rarities are kept, such. For example, giant otters or an Amazon dolphin from South America, bear stubborn monkeys and brush-tailed hogs from Africa, fossils from Madagascar, clouded leopards from Asia or wombats from Australia. Every year around one million guests visit the zoo (2014: 1,024,000).