In an arid country like Namibia, an abundance of fresh water is the part of the recipe that makes the Mamili (Nkasa Lupala) and Mudumu national parks special. Flowing rivers and a mosaic of flooded grasslands, braided flood-plain channels, extensive reedbeds and papyrus swamps, heavily wooded islands and open-water habitats constitute a wet world that attracts a special variety of animals you won't find in the country's drier places.