At this point the eroded path reveals the dune’s sand, which comes from the beaches of the Gulf of Roses. At the start of the fourteenth century, Ponç Hug, the Count of Empúries, changed the course of the Ter. There was now nothing to stop the dune advancing, driven by the strong tramuntana wind. The sand threatened to swallow farmhouses and farmland until, in the early twentieth century, the decision was taken to stabilise it. Forestry activity turned the dune into the pine wood we can now enjoy. At the deepest points there are 30 metres of sand.