There's a lake that's literally a giant sinkhole - Apparently.
Lake Hillier, located in Western Australia, is a vibrant pink saltwater lake that's a whopping 6 meters (20 feet) deep. Measuring just 640 meters (2,100 feet) in diameter, it's a tiny but uniquely shaped body of water. This phenomenon is due to the presence of high levels of the salt-dwelling microorganism Dunaliella salina, which gives the lake its distinctive color and chemistry.