Source of the Órbigo Nature · Las Omañas, Astorga, León Image of Las Omañas, not of the place itself. In this district the rivers Luna and Omaña meet to give rise to the Órbigo, a fact recorded on the municipal coat of arms and one that explains the place name itself, derived from aqua magna, great water. Its banks are of poplar groves and hop fields. Photo: Rodelar (CC BY-SA 4.0) What to see and do in Las Omañas