Nice is a city in and the prefecture of the Alpes-Maritimes department in France. The Nice agglomeration extends far beyond the administrative city limits, with a population of nearly one million on an area of 744 km2 (287 sq mi). Located on the French Riviera, the southeastern coast of France on the Mediterranean Sea, at the foot of the French Alps, Nice is the second-largest French city on the Mediterranean coast and second-largest city in the Provence-Alpes-Côte d'Azur region after Marseille. Nice is approximately 13 kilometres (8 mi) from the principality of Monaco and 30 kilometres (19 mi) from the French–Italian border. Nice's airport serves as a gateway to the region.