The Murray–Darling Basin is Australia's most iconic river system (or 'catchment').
It is also one of the largest river systems in the world and one of the driest. It is divided into the northern Basin (Darling system) and the southern Basin (Murray system).
The Basin is ecologically diverse, supporting a wide range of nationally and internationally significant plants, animals and ecosystems. It includes the Willandra Lakes Region World Heritage site, where the remains of Mungo Man and Mungo Lady were discovered.