About 35 km northeast of the capital Dakar is surrounded by rainforest and dunes the lake Lac Retba. Because of its unique phenomenon, namely the always pink surface, it is also called Lac Rose. The coloring is caused by bacteria contained in the lake, which give it its characteristic and eponymous coloring. In addition, it is very salty, even over forty percent salty than the Dead Sea. Due to its pink color, the Lac Rose is on the list of UNESCO World Heritage candidates. With only about 3 square kilometers, although it is quite small, but still represents a unique and remarkable natural phenomenon in the world dar. Since the lake is a public good, anyone here may mine the white gold. However, the salt must be extracted by hand in order not to endanger the sensitive ecological balance of the water.