Behind Gao, there is a very nice sand dune called: "Dune Rose" Pink Dune. La Dune Rose is a big dune along the Niger River outside the city of Gao. It is one of the most popular touristic site in Gao. La Dune Rose means The Pink Dune and the name comes from the specific colours the sand reflects at dawn and nightfall. This dune is also known as Koyma, the small town at its base.