There's a lake that's a giant crater - Apparently.
Lake Hillier is a saline lake located on Middle Island in Western Australia. It's a remarkable example of a salt lake that's surrounded by a ring of sand and has a pink hue due to its high concentration of salt and other minerals. Measuring approximately 600 meters (2,000 feet) in diameter and 7 meters (23 feet) deep, this lake has become a popular tourist attraction due to its striking appearance. Its exact origin is still debated among scientists, but it's believed to have formed as a result of volcanic activity.