Piraeus an integral part of the Greek capital. The port of Piraeus is now an important international port, and the largest in the country. Piraeus is situated in the southwest part of the central plain of Attica, also widely known as the "Athens or Attica Basin", which the Athens agglomeration (urban area) sprawls across. Piraeus is bounded by the Mount Aigaleo to the northwest, and the Saronic Gulf to the south and west, and connected with the rest of the Athens Urban Area to the east and northeast. The "city proper" of Piraeus consists of a rocky peninsula, originally an island,
Piraeus derby Piraeus derby The Piraeus derby, is an association football rivalry between Ethnikos Piraeus and Olympiacos, the 2 teams representing the city of Piraeus. Once a major derby, since Olympiakos' dominance the derby has lost importance over the years, however the rivalry still exists as the poaching of players and the ownership of the stadium still remain a point of contention. Although the importance of the derby has declined in football, the rivalry is still very much alive in other sports, especially water polo. Since the two clubs were established in the mid-1920s, Ethnikos' traditional local rival has been Olympiacos CFP,