Aqueduct of el Perdón Monument · Illescas, La Sagra, Toledo Image of Illescas, not of the place itself. Waterworks from the end of the 19th century, popularly known as the Matajudíos aqueduct, which supplied the town with water. It is a testimony to 19th-century engineering in Illescas. Photo: SanTeleco (CC BY 3.0) What to see and do in Illescas