The longest fence in the world is the Dingo Fence, located in Australia. This remarkable structure was originally built in the 1880s to keep dingoes, wild dog species, away from fertile land and livestock in Queensland. It stretches approximately 5,614 kilometers (3,480 miles), making it longer than the Great Wall of China. The Dingo Fence not only serves its purpose of animal control but has also become an iconic symbol of Australia's rural landscape. Over the years, it has undergone maintenance and repairs but remains a testament to the country’s efforts in agricultural protection.