Algiers:
is Algeria’s main administrative centre and also the country’s main harbour, serving as both a shipping center and a principal Mediterranean refueling station. The main industries of Algiers are oil refining, metal works, food, and petrochemicals. The main export products are iron, grain, citrus fruit, wine, phosphates, oil, and vegetables.It is located on the Mediterranean Sea, in the north-central part of the country, in from a cluster of islets that have now been turned into a part of the port.The Grand Mosque is the oldest mosque in Algiers. It is said that this building already existed in 1018. The beautiful interior of the mosque is square and is divided into aisles by columns joined by Moorish arches.