Minería del carbón en la cuenca Peñarroya-Belmez-Espiel Historical milestone · Espiel, Valle del Guadiato, Córdoba Image of Espiel, not of the place itself. During the 19th century, coal mining developed in Espiel within the Peñarroya-Belmez-Espiel mining basin, one of the most important in Andalusia, which shaped the municipality's economy and landscape for more than a century. Photo: Antonio Montilla Lucena (CC BY-SA 3.0) What to see and do in Espiel