Lake Kariba is the world’s largest man-made dam by volume, extending over 5000km2 along Zambia’s southern border. Completed in 1959, the dam provides hydro-electric power to both Zambia and Zimbabwe, and fish stocks – mainly tilapia, kapenta and the prized tigerfish – are also shared. Access to the Zambian side the lake is fairly limited, with Sinazongwe or Siavonga the only two towns of any significance. Siavonga is the larger, a sleepy lakeside holiday village that’s popular with locals and only a few hours’ drive from Lusaka. Sinazongwe is much smaller and less developed, and most head to Siavonga as their base for exploring the lake.