Southern Belle Siavonga Lake Kariba The Southern Belle ,one of the largest houseboats in Southern Africa is found on Lake Kariba, Zambia, Lake Kariba is over 220 kilometers long and up to 40 kilometers in width and covers an area of 5,580 square kilometers. Several islands, including Maaze, Mashape, Chete, Sekula, Sampa Karuma, Fothergill, Spurwing,