The Great Artesian Basin (GAB[1]), located in Australia, is the largest and deepest artesian basin in the world, stretching over 1,700,000 square kilometres (660,000 sq mi), with measured water temperatures ranging from 30 to 100 °C (86 to 212 °F). The basin provides the only source of fresh water through much of inland Australia.[2]
Never heard of it and I have to wonder why.