Lake Retba, also known as Lac Rose, is a saltwater lake located in Senegal, near the Atlantic Ocean. It is famous for its striking pink color, which is caused by the presence of Dunaliella salina, a type of algae that thrives in high-salinity environments. The lake is also known for its high salt concentration, making it one of the saltiest bodies of water in the world. The lake is a popular destination for tourists and locals alike, who come to witness its unique color and to engage in salt harvesting. The surrounding area is home to various communities that rely on the lake for their livelihoods, particularly through the collection of salt, which is an important economic activity in the region.