Spanning over 5,600 kilometres, the Dingo Fence—shown in red on the map—is one of the longest structures in the world. Built in the late 1800s to protect southeastern Australia’s fertile sheep-grazing lands, it stretches across South Australia, New South Wales, and Queensland. Its purpose is to keep dingoes out of the more populated and agriculturally rich regions, and it remains a striking example of Australia’s efforts to manage its unique wildlife.