The world's largest inland delta, Okavango Delta (also known as Okavango Swamp) is formed by the emptying of the Okavango River into the Kalahari Desert at the place where an ancient lake once sat. An immensely wildlife-rich expanse of islands, islets and lagoons (many of which change shape and even disappear with the coming of every annual flood season), Okavango is home to many safari camps, most of which aren't reached by road but rather by small airplane from Maun, the area's main village.