Built in 1862, this is the oldest zoo in the world and makes a great day out with kids. Some 3,000 animals reside here, including kangaroos, wallabies, echidnas, koalas, wombats, and platypuses. Rather than being locked in cages, most animals are in almost natural surroundings or well-tended gardens. Don’t miss the butterfly house, with its thousands of colorful occupants flitting around; the free-flight aviary; the lowland gorilla exhibit; and the treetop orangutan exhibit. Allow at least 90 minutes if you just want to see the Australian natives, and around 4 hours for the entire zoo.