Lake Hillier (Pink Lake) is a saline lake on the edge of MIddle Island, the largest of the islands and islets that make up the Recherche Archipelago off the south coast of Western Australia.
It’s completely Pink!
The pink color is permanent and doesn’t alter when the water is taken in a container. The source of the pink color is considered to be due to the presence of the organism Dunaliella salina.
The only living organism in the lake is this algae.
Dunaliella salina produces pigment compounds called carotenoids, helping it to absorb sunlight and giving the algae pink color.
The lake is perfectly safe to swim in despite the high salt content.