sentences:  Member states of the African Union cover almost the entirety of continental Africa, except for several territories held by Spain (Canary Islands, Plazas de soberanía); France (Mayotte, Réunion, Scattered Islands in the Indian Ocean); Portugal (Madeira, Savage Islands); and the United Kingdom (Saint Helena, Ascension and Tristan da Cunha).Consequently, the geography of the African Union is wildly diverse, including the world's largest hot desert (the Sahara), huge jungles and savannas, and the world's longest river (the Nile).The AU presently has an area of , with of coastline.