Hillier Lake can be found on the Middle Island, the largest island of the Rechercher Archipelagos of Western Australia. Scientists still don’t know why the lake is a bubble-gum pink color, but the color does not change when you put it in a vessel. The Lake is saline, and surrounded by a belt of white salt beaches.The length of the lake is about six hundred m. A narrow strip of land composed of sand dunes covered by vegetation separates it from the ocean. The lake is surrounded by a rime of white salt and a dense woodland of Paperbark and Eucalypt trees with sand dunes separating the lake from the Southern Ocean to the north
The island and lake are thought to have been first explored by the Flinders expedition in 1802. Captain Flinders is said to have observed the pink lake after ascending the island’s peak. John Thistle, the ships master collected some of the lake’s water which he found to be saturated with salt [2].The reason for the lake’s colour is still under investigation, and so far no one has come up with a reasonable explanation. However, the most probable explanation according to some scientists involves the low nutrient concentrations and different types of bacteria and algae that are responsible for the lake’s pink colour. But there is no traces of algae in the samples of water which is taken from Lake Hillier. The lake is one of the natural wonders of Australia.