NigerNiger, officially the Republic of Niger, is a landlocked country in Western Africa, named after the Niger River.Niameyis the capital and largest city of the West African country Niger. Niamey lies on the Niger River, primarily situated on the east bank. It is an administrative, cultural and economic centre.The W National Parkor W Regional Park is a major national park in West Africa around a meander in the River Niger shaped like a "W". The park includes areas of the three countries Benin, Niger and Burkina Faso,The Niger Riveris the principal river of western Africa, extending about 4,180 km (2,600 mi). Its source is in the Guinea Highlands in southeastern Guinea. It runs in a crescent through Guinea, Mali, Niger, on the border with Benin and then through Nigeria, discharging through a massive delta, known as the Guinea Delta or the Oil Rivers, into the Gulf of Guinea in the Atlantic.The Aïr Mountainsor is a triangular massif, located in northern Niger, within the Sahara Desert.Lake Chadis a historically large, shallow, endorheic lake in Africa, which has varied in size over the centuries.The Tibesti Mountainsare a mountain range in the central Sahara, primarily located in the extreme north of Chad, extensions into southern Libya and Niger.