JOHANNESBURG: The hulks of stepped, golden sand - looking from the air like rows of pre-Columbian pyramids - have long been part of Johannesburg's cityscape. Now, they are fast disappearing as mining companies cash in on high gold prices and reprocess the mountains of what they once dumped as waste...."We are manufacturing real estate within the expanding central business district but, just as importantly, with the dumps being a source of dust and water pollution, the general environment is being cleaned up," said Charles Symons, regional general manager for DRDGold....

Source: http://www.iht.com/articles/2007/04/16/business/sand.php