This is Lake Retba, or Lac Rose, as the French call it, located in Senegal. The pink color is caused by algae, dunaliella salina. The algae turns pink during the dry season, making the whole lake appear milkshake pink. Like the Dead Sea, Lake Retba also has a high salt level, which makes you able to float in it. Feeling the urge? Hop on a plane to Dakar, and take a road trip to the Cap Vert peninsula.