The 'Dingo Fence Coober Pedy, South Australia Stock Photo

The Dingo Fence or Dog Fence is a pest-exclusion fence that was built in Australia during the 1880s and finished in 1885, to keep dingoes out of the relatively fertile south-east part of the continent and protect the sheep flocks of southern Queensland. It is one of the longest structures in the world and is the world's longest fence. It stretches 5,614 kilometres (3,488 mi) from Jimbour on the Darling Downs near Dalby through thousands of kilometres of arid land ending west of Eyre peninsula on cliffs of the Nullarbor Plain.