premise: Sierra Morena is a thing.
hypothesis: The Sierra Morena is one of the main systems of mountain ranges in Spain . It stretches for 450 kilometres from east to west across the south of the Iberian Peninsula , forming the southern border of the Meseta Central plateau and providing the watershed between the valleys of the Guadiana to the north and the west , and the Guadalquivir to the south . The name Sierra Morena has a strong legendary reputation in Spanish culture and tradition , with myths about bandits ( Los bandidos de Sierra Morena ) , a giant snake ( El Saetón de Sierra Morena ) and a child brought up by wolves ( Marcos Rodríguez Pantoja ) , among others . This range is also mentioned in the famous Mexican song `` Cielito Lindo '' and in one of the most well known traditional Spanish songs , `` Soy Minero '' , interpreted by Antonio Molina . Sierra Morena ( English translation : Brown Mountain Range ) is a Cuban village and consejo popular ( people 's council ) of the municipality of Corralillo , Villa Clara Province .