South Africa's Largest Dam
Arrange with the Department of Water Affairs for a tour through the tunnels in the wall of the Gariep Dam, South Africa's largest dam both in terms of water volume and surface area.
When water drips on your head, try not to think about the 400-odd square kilometres of water on the other side of the concrete. South Africa's largest dam, the Gariep, is on the Orange River. It can hold 5 341 million cubic metres of water when it's full.
By David Bristow