This presentation discusses the pink-colored Lake Retba or Lac Rose located in Senegal, Africa. It is so named because its pink waters are caused by cyanobacteria. The lake's color changes from mauve to deep pink depending on sunlight and time of day. The lake also has a high salt content that allows people to float easily, and salt collection is an important industry on the lake. The lake has been on UNESCO's tentative World Heritage List since 2005 due to its unique pink color.