Lake Hillier is located on an island off Australia’s coast, and its special color has been puzzling scientists for centuries. This lake is completely pink! Scientists believe that the pink color is caused by a type of algae, or by the presence of a high number of bacteria in the salt crusts. Unlike other pink lakes in the world, when you pour Lake Hillier’s water into a glass, it stays pink. Lake Hillier is only 250 meters wide, and is an important place for many migrating and native birds.