Mt G

The Blue Lake is a large, monomictic, crater lake located in a dormant volcanic maar associated with the Mount Gambier maar complex. The lake is situated near Mount Gambier in the Limestone Coast region of South Australia, and is one of four crater lakes on Mount Gambier maar. Of the four lakes, only two remain, as the other two (Leg of Mutton and Brown) have dried up over the past 30 to 40 years as the water table has dropped.

The Valley Lake is a monomictic crater lake in the Australian state of South Australia situated in the south of Mount Gambier, near the Blue Lake. The Lake is surrounded by a park situated on Davidson Drive. The shore of the lake features a kids playground, sporting facilities, BBQs and toilets. There is also a Wildlife Park, as well as Centenary Tower at the top of the surrounding crater.