Autumn mushrooms of the Ribagorza Food and drink · Castejón de Sos, La Ribagorza, Huesca Image of Castejón de Sos, not of the place itself. From August to December the pine and beech woods of the Benasque valley yield saffron milk caps, ceps and other mushrooms that are stewed with garlic and ham, added to rice dishes or preserved for the rest of the year. Photo: Rafael Jiménez from Córdoba, España (CC BY-SA 2.0) What to see and do in Castejón de Sos