Evaporation

The production of salt in Añana is based on the evaporation of water from the brine by natural means. To do so, salt water is poured on horizontal surfaces called 'balsas' (rafts) or threshing pits whose surface varies between twelve and twenty square meters.

The groups of threshing pits worked by the same owner were called farms. They are adapted to the complex topography of the site, both in form and height, resulting in complicated shapes that cover most of the Salt Valley territory. The point of maximum splendor was in the middle of the twentieth century, when in the valley there were 5648 threshing pits in operation.