Nouadhibou International Airport — Nouadhibou, Mauritania

Mauritania's second city sits on a narrow peninsula shared with the disputed territory of Western Sahara, its economy built almost entirely on Atlantic fishing grounds and iron ore exports. NDB serves Nouadhibou, where one of the world's longest freight trains hauls ore hundreds of kilometers from the Zouérat mines to port for shipment, a logistical feat that makes the airport an important link for engineers, traders, and fishing industry workers moving between the city and the capital, Nouakchott, or onward to Europe. The nearby waters, rich with fish stocks drawn by the cold Canary Current, have made Nouadhibou a magnet for foreign fishing fleets and a source of ongoing tension over resource management. Just south lies the Banc d'Arguin National Park, a UNESCO-listed wetland renowned for migratory birds and traditional Imraguen fishing communities, adding a modest ecotourism dimension to a city otherwise defined by heavy industry and its harsh, wind-scoured desert coastline.