The Blue Lake
Introduction
Some 20 kilometres west of the Victorian border in the state of South Australia is Mount Gambier. It is an extinct volcano. Now it is filled up with water.
About the Blue Lake
It changes colour from grey to a brilliant cobalt blue in about October and remains that way until March. This changing of the colour is an unexplained phenomenon. The Blue lake is the source of the town's water supply.
Did you know.
The scientists believe that it changes colour is because of the limestone.