الساقية الحمراء
Located in the Saguia el-Hamra region, Bou Craa is the site of a phosphate deposit of 1.7 billion tons. Mining began there in 1972. During the Spanish colonization time of the area (see Spanish Sahara), many early recruits of the nationalist movements Harakat Tahrir and Polisario Front were Sahrawi workers in the phosphate mines.