The ruined city of Ouadane with it's ancient mosque. Ouadane was founded in in the 10th century by the Berber tribe Idalwa el Hadji and soon became an important caravan and trading centre. A Portuguese trading post was established in 1487, but the town declined from the sixteenth century. The old town, a World Heritage Site, though in ruins, is still substantially intact, while a small modern settlement lies outside its gate.