Valley of the Eo river in Piquín Nature · A Ribeira de Piquín, Meira, Lugo Image of A Ribeira de Piquín, not of the place itself. The upper stretch of the Eo hemmed in between the sierra of Meira and that of Pousadoiro, included in the biosphere reserve of the river Eo, Oscos and Terras de Burón; its alder banks hold trout and otters. Photo: Elisardojm (CC BY-SA 4.0) What to see and do in A Ribeira de Piquín