Embalse de La Fernandina Nature · Carboneros, Sierra Morena, Jaén In the southeast of Carboneros's municipal territory, on the Guarrizas river, lies the La Fernandina reservoir, in an area of gentler relief that contrasts with the rugged landscape of Sierra Morena to the northwest of the municipality. Photo: kallerna (CC BY-SA 4.0) What to see and do in Carboneros