Arab watchtower of El Molar Monument · El Molar, Cuenca del Medio Jarama, Madrid Image of El Molar, not of the place itself. Watchtower of Arab origin dated between the 9th and 10th centuries and rebuilt by the town council. It formed part of the defensive system with which al-Andalus watched over this frontier, together with the watchtowers preserved in El Berrueco and El Vellón. Photo: Zarateman (CC0) What to see and do in El Molar