Cerco de Buitrones of Almadenejos Historical milestone · Almadenejos, Valle de Alcudia, Ciudad Real Cerco de Buitrones (roasting-furnace enclosure) of Almadenejos, with the kilns where cinnabar was distilled to obtain mercury, built in the late 17th century together with the rest of the settlement, which grew up at that time around the mines of El Entredicho, Valdeazogues and La Concepción. Photo: 19Tarrestnom65 (CC BY-SA 4.0) What to see and do in Almadenejos