They explored the land to the south of the Murray river.

Arid lands, surprisingly, contain some of the world's largest river systems, such as the Murray-Darling in Australia, the Rio Grande in North America, the Indus in Asia, and the Nile in Africa.

Mildura and Renmark are surrounded by desert, and fruit farms and vineyards survive only with irrigation from the Murray River, the lifeblood of Australia's agriculture.