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.