Mosterts Mill is the only working windmill in South Africa
Mostert's Mill is a truncated tower-mill with a revolving cap (thatched roof) that allows the sails to be turned into the wind. This type of mill is called a Grond Zeile by the Dutch and refers to the fact that the sails are serviced from the ground. There is no equivalent English term for Grond Zeile. This Grond Zeile mill is usually found where there is no obstruction to the wind.