Luna Valley in Tapia de la Ribera Nature · Rioseco de Tapia, Tierras de León, León The municipality lies at an average altitude of some 900 metres, with its three villages spread across the Luna valley. This is the stretch where the river, now out of the mountains, begins to open out floodplains before joining the Omaña. Photo: Todonegro (CC BY-SA 4.0) What to see and do in Rioseco de Tapia