Lago del Valle Nature · Somiedo, Oviedo, Asturias The largest lake in Asturias: twenty-four hectares at 1,580 metres above sea level, at the foot of a glacial cirque in the Valle del Lago. Its present size is due in part to the dam that fed the La Malva hydroelectric station. Photo: Ángel M. Felicísimo from Mérida, España (CC BY 2.0) What to see and do in Somiedo