High-altitude pastures of Abelgas de Luna Nature · Sena de Luna, La Montaña de Luna, León Image of Sena de Luna, not of the place itself. The high pastures of Abelgas, Rabanal and Robledo de Caldas preserve brañas and shepherds' folds in communal use within the biosphere reserve of the Omaña and Luna valleys, with hay meadows that climb up to the foot of the sierra. Photo: Fundación Joaquín Díaz (CC BY-SA 3.0) What to see and do in Sena de Luna