Lake Retba or Lac Rose lies north of the Cap Vert peninsula of Senegal, north east of Dakar. Depending on the time of day, the lake changes colour from a light purple to a deep scarlet pink. The unusual colouring of the water is caused by harmless halophilic bacteria that thrive in the lake’s high-salinity environment. The color is particularly visible during the dry season.
Why is this lake pink? Mostly because of its high mineral content that generates a chemical reaction with the high salt content. And because it has so much salt, everything on the water floats. Located in Senegal, Africa.