The Salar de Uyuni in Bolivia is not just a tourist attraction, it is a working salt flat. The salt is pushed into piles for harvest and as you can see, there are a lot of them. This is done in the dry season after the water from the wet season has evaporated. There are plenty of tours operating from Uyuni to get to the flats, and some include salt hotels and the train graveyard. Our tour was over several days, transport was in 4x4, and we also had a cook as well as a driver. Make sure you take sunglasses, this place is blinding with the altitude, sun and of course white salt everywhere!