Portugal. The city lights of Spain and Portugal define the Iberian Peninsula in this photograph from the International Space Station (ISS). Several large metropolitan areas are visible, marked by their relatively large and brightly lit areas, including the capital cities of Madrid, Spain -- located near the center of the peninsula’s interior -- and Lisbon, Portugal -- located along the southwestern coastline. The ancient city of Seville, visible to the north of the Strait of Gibraltar, is one of the largest cities in Spain. [NASA]