Indigenous groups have a strong spiritual and cultural connection to the River Murray and its lands and waters. The river sustained them with food sources like fish, shellfish, birds, and animals. Significant cultural sites exist along the river for burials, fishing, dreaming stories, rock art, and history. Ancient fish traps near Brewarrina are among the oldest human-made structures in the world. The Willandra Lakes were also an important area, containing some of the oldest human remains outside of Africa.