The Port of Turku (, ) is a port located in the south-west of Finland, where the mainland meets the beginning of the Turku archipelago. Sited within Finland's sixth largest city, the port principally handles traffic between Turku and the Swedish capital of Stockholm and the enclaved Åland. Harbour The port spans a wide area on the southern coastline of the city of Turku, from the mouth of the River Aura to the district of Pansio. The area around the railway station is served by the four (twice-daily) Silja line and Viking Line passenger ferry services to Stockholm via Mariehamn, the capital of Åland. Importance Because of the port's location at the southwestern corner of Finland the harbour provides the most efficient route to serve the Baltic Sea. Turku Harbour is one of the most important shipment points in the country, handling over four million tonnes of cargo and a corresponding four million passengers per year. As a comparison to Helsinki-Vantaa Airport; Turku handles one third as many passengers per year, but thirty times as much freight annually. Daily passenger ferry traffic is operated from Turku to Åland and Stockholm. Weekly ferry destinations include Travemünde, Hamburg, Lübeck, Antwerp, Harwich and Paldiski. There are also less frequent connections to popular holiday destinations such as St Malo and several cities in Spain. The most important operators of ferry services are Silja Line and Viking Line. District Port of Turku (Finnish Turun satama; Swedish Åbo hamn) is also the name of a district of Turku, with boundaries roughly corresponding with those of the port's area. , the district had a registered residential population of forty-four people. The port is mentioned in the Arab geographer Muhammad al-Idrisi's 1154 book Kitab Rudjdjar, reflecting Turku's status as a capital city and major Baltic Sea trading post. Railway Turku Harbour railway station is located adjacent to the main passenger-ferry berths used by the ferries to Stockholm in Sweden and has two full-length tracks arranged with a central platform between them. Passengers walk directly off the platform and onto the car-park and bus-station area in front of the ferry terminals. Most traffic to the station is by people wishing to board a ship at the port and the services are timed to overlap with the ferries berthing times. The station has direct boat-train services to Helsinki and towards Pieksämäki (terminating or starting in Tampere). All services to and