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The Devils Marbles are a collection of huge, round, red-colored boulders found in the Tennant Creek region of Australia's Northern Territory. The area is located near Wauchope, 114km south of Tennant Creek, in the Northern Territory. It contains formations of naturally rounded and oval boulders called Karlu Karlu by the local Aborigines. The boulders are located in a traditional Aboriginal sacred site and are important to the local Aboriginal people. The Kaytetye people believe that the boulders are the eggs of the rainbow serpent.