The Murray River is the greatest of Australia's rivers. The source of its water is the snowy Australian Alps. Salt is a natural feature in many Australian landscapes. The Murray-Darling Basin’s low rainfall and high evaporation have combined to concentrate salt in the groundwater. This salt is produced naturally from the underground brines in the Murray Darling Basin. A red pigment, carotene, is secreted from the salt tolerant algae. The underground saline waters have been laying dormant for thousands of years. By utilizing these waters the environment is improved and a beautiful salt is produced.