Lake Hillier is a naturally pink lake located on Middle Island in Australia. The color is the result of the green algae and a high concentration of brine prawn, which, along with the right environmental conditions, allows the algae to produce the red pigmented beta carotene, which is also the culprit that makes it important for you to eat your carrots like your mom told you.
Lake Retba or Lac Rose in Senegal, which has such a high salt concentration that salt collectors must rub shea butter on their skin to protect it from damage.
The Great Salt Lake in Utah, which, like the other pink lakes, has such high salinity that people can float in it easily, like the Dead Sea. This lake, however, is the habitat of many native birds, waterfowl, and brine shrimp.
via Oasis Unedited