Source of the Navia and Lor rivers Nature · Pedrafita do Cebreiro, Ancares, Lugo Image of Pedrafita do Cebreiro, not of the place itself. Two of the great rivers of the Lugo mountains rise in the ranges of this concello: the Navia, which flows north towards the Cantabrian Sea, and the Lor, which cuts southwards in search of the Sil. Photo: José Antonio Gil Martínez (CC BY 2.0) What to see and do in Pedrafita do Cebreiro