Mills of the Combos stream Monument · Arroyomolinos, Comarca Sur, Madrid Image of Arroyomolinos, not of the place itself. The stream once drove seven mills that gave the village its name, six flour mills and one fulling mill; the ones that survive, of Mudéjar construction and probably of Islamic origin, were built between the 14th and 15th centuries and were still grinding in the 19th century. The arroyo de los Combos itself, which also flows through Móstoles and Moraleja de Enmedio before running into the Guadarrama, retains pine woods on its banks that contrast with the deforestation of the surrounding area; in the past its course was also used for irrigation, with a small dam between the municipalities of Móstoles and Arroyomolinos. Photo: Wikipedia / Wikimedia Commons (CC BY-SA) What to see and do in Arroyomolinos