Alcazarquivir, in Arabic Ksar el-Kebir, means large palace or large castle. It is the largest city in the Moroccan province of Larache, in the southwest of what was the Spanish protectorate.
Today it heads a region, on the Gharb plain, near the Atlantic, where there is no shortage of water. The Lucus River and its tributaries also supply a large swamp: the Oued Al Makazhine.