South Australia is the state located in the southern part of Australia. Its capital is Adelaide. It is the 4th largest of Australia's 8 states and territories. In South Australia, many people live underground in Coober Pedy to stay cool in the hot climate, as the area is located near the center of Australia. Another unique feature is Blue Lake in Mount Gambier, which has bright blue water that changes color and is located in a volcanic crater. South Australia also has its own flag depicting its history and symbols like the Piping Shrike bird and Hairy Nosed Wombat animal.