Arab waterwheel of Aldea del Fresno Monument · Aldea del Fresno, Sierra Oeste, Madrid The remains of a water-raising wheel at the foot of the church of San Pedro, beside the River Perales, which some authors date to the 12th century; it is listed in the Region of Madrid's inventory of cultural assets. Photo: Dirección General de Turismo. Consejería de Economía e Innovación Tecnológica. Comunidad de Madrid. (CC BY 3.0 es) What to see and do in Aldea del Fresno