After taking the Ocean Road and driving to Adelaide, I went to Mantgambier to stay and enjoy the beautiful scenery of the Blue Lake. First, search through the Google satellite map of Australia's Mount Gambil Blue Lake, you will find that the only blue lake in the world is dark blue, just like a blue gemstone inlaid on the map. The lake is blue and blue. It's very beautiful. There is a pumping station beside the Blue Lake to ensure that the water level of the lake is always below the level of the urban streets.