Satellite image, showing the Bou Craa mine in 2000 (top) and 1987 (bottom)
Bou Craa is a town in Western Sahara, about 100 kilometres (62 mi) from El Aaiún. It is a mining town, where phosphate is mined. The world's ongest conveyor belt connects it to the coast neare El Aaiún. Boucraa contains the largest known reserves of phosphate.