Lake Hillier – without outflow lake located on the Australian island of Middle Recherche Archipelago belonging to a complex of about 100 islands off the south-west coast of Western Australia. It is a saline lake with a width of about 600 meters from the ocean and separated by a narrow strip of land. It has a shape resembling a footprint from the edge of the forest and is separated by a belt of sand mixed with salt. Is located among forested land and eucalyptus trees. The reason for the pink water has not yet been determined.