Koalas were introduced to Phillip Island in the 1880s, and at first they thrived in the predator-free environment. However, overpopulation, the introduction of foxes and dogs, and the clearing of land for farmland and roads have taken their toll. Though you can still see a few koalas in the wild, the best place to find them is at this sanctuary, set up for research and breeding purposes. Visitors can get quite close to them, especially on the elevated boardwalk, which lets you peek into their treetop homes. At around 4pm, the ordinarily sleepy koalas are on the move—but this is also the time when tour buses converge on the place, so it can get crowded.