The last remaining free-flowing river in the Murray-Darling Basin, with wetland types including large overflow lakes, tree-lined creeks and waterholes, lignum and canegrass swamps, and artesian mound spring. The Site is one of the most important wetland systems for waterbirds in eastern Australia and supports a number of threatened plant and animal species as well as significant native fish communities. The area is highly significant for local Aboriginal people for its archaeological, traditional and contemporary social values.