The Luangwa River is one of the major tributaries of the Zambezi River, and one of the four biggest rivers of Zambia. The river generally floods in the rainy season (December to March) and then falls considerably in the dry season. It is one of the biggest unaltered rivers in Southern Africa and the 20,000 square miles (around 50,000 square kilometers) that make up the surrounding valley are home to abundant wildlife.
The upper and middle parts of the valley contain the North Luangwa National Park and South Luangwa National Parks of Zambia, which are among some of the finest in Africa. The river itself is home to large populations of hippopotami and crocodiles. The World's largest concentration of hippos lives in the Luangwa Valley. In the dry season they are restricted by the shrinking river and pools, and are easily seen especially in isolated pools.