Zambia is a landlocked country in southern Africa, consisting of high plains and mountains. Its elevated position gives it a subtropical climate. It takes its name from the Zambesi River, which for some of its length forms the southern boundary. In the north the river runs through the Barotse floodplains, later providing one of Africa’s most memorable natural spectacles in the hundred metre high Victoria Falls, arguably the world’s largest waterfall. The local name, Mosi-o-Tunya, means ‘the smoke that thunders’, a graphic description of the column of spray that can rise 400 metres into the air, and is visible from thirty miles away. The river widens into Lake Kariba, at 140 miles long the world’s largest reservoir. Near Lake Tanganyika in the north of the country are the Kalambo Falls, a single drop of 230 metres, the second highest in Africa. Over eighty languages are spoken in Zambia. The economy has been dependent on copper mining, and has suffered from fluctuations in the price. Traditional crafts include fabrics, wood carving, pottery and basket weaving. The staple diet is nshima, a porridge made from maize or cassava. The best known National Parks are the Kafue and South Luangwa Parks.