Lake Hillier, Australia's Colored Pink Lake

Lake Hillier is a nearly 2,000-foot-wide lake on Middle Island, the largest of the Recherche island chain in the state of Western Australia. The remote lake is accessible via plane or boat excursion from nearby Esperance. The cause of the Lake Hillier's color isn't fully known. A high level of salinity and dye-producing bacteria are possible sources of the distinctive hue.