Mungo National Park, 135km northeast of Wentworth, is most easily reached from the river townships of Wentworth and Mildura (over the Victorian border about 110km away). Organized tours run to the park from both towns, but as long as the roads are dry it is easy enough to drive yourself in an ordinary vehicle. The last 90km to the park are dirt, as are all the roads in the park.

The park is part of the dried-up Willandra Lakes System, which contains the longest continuous record of Aboriginal life in Australia, dating back more than forty thousand years. During the last Ice Age the system formed a vast chain of freshwater lakes, teeming with fish and attracting waterbirds and mammals. Aborigines camped at the shores of the lake to fish and hunt, and buried their dead in the sand dunes. When the lakes started drying out fifteen thousand years ago, Aborigines continued to live near soaks along the old river channel. The park covers most of one of these dry lake beds, and its dominant feature is a long, crescent-shaped dune, at the eastern edge of the lake, commonly referred to as the Walls of China. This low dune system barely rises 30m from the level of the lake bed, but it is a dramatic spot especially around dawn and sunset when the otherworldly shapes and ripple patterns glow golden and kangaroos and goats make their way onto the dunes for meagre pickings.