Mills of the río das Mestas Curiosity · Cerdido, Ortegal, A Coruña Image of Cerdido, not of the place itself. The valley of the river das Mestas preserves, above all near its mouth at Porto do Cabo, a succession of stone flour mills, some still with their millpond shaft and horizontal wheel in good condition. Photo: Estevoaei (CC BY-SA 4.0) What to see and do in Cerdido