Kakadu National Park also features many ancient art sites. Apart from drawing mystical figures from their dream time culture, the Aborigines also did a lot of practical and straightforward painting, e.g. to educate their children about possible food sources. Preferred drawing material was and is ochre, which plays an important part in Aboriginal culture (also for body paintings).
The Aborigines belief, that the mystical dream time figure of the rainbow serpent laid its eggs here. Geologists get equally excited at this seemingly random accumulation of massive round stones. It is not too difficult to understand why marbles feature in the English name of the site.