Lake Hillier is a lake located on the Middle Island of the Recherche Archipelago which is to the west of Australia. The 1969 ft long lake has a vibrant and vivid pink hue and is surrounded by a salt crust deposits. The color of the lake is caused by the micro-algae, Dunaliella Salina, that can live in the extreme concentrations of salt. There are no other organisms living in the lake besides the algae. Lake Hillier is only one of the multiple pink lakes found around the world.