Lake Cheiroso Nature · Páramo del Sil, El Bierzo, León Image of Páramo del Sil, not of the place itself. A small lake of glacial origin hidden on the northern slope of the peak of El Miro, 1,990 metres high, within the mountain rim that separates the Sil valley from Asturias and holds back the Atlantic influence over the Bierzo basin. Photo: Moisés Alcalá (Public domain) What to see and do in Páramo del Sil