Lake Päijänne () is the second largest lake in Finland (). The lake drains into the Gulf of Finland via the Kymi River. The major islands are from north to south Vuoritsalo, Muuratsalo, Onkisalo, Judinsalo, Edessalo, Taivassalo, Haukkasalo, Vehkasalo, Mustassalo, Virmailansaari and Salonsaari. The largest island is Virmailansaari. The word saari means an island. Salo once meant a great island, nowadays it means a great forest area. The largest city on the shores of Päijänne is Jyväskylä in the North. The city of Lahti is connected to Päijänne through Lake Vesijärvi and Vääksy canal. An underground aqueduct, Päijänne Water Tunnel, connects the lake to Vantaa, providing the Greater Helsinki area with water. The deepest point in any lake in Finland is located in Päijänne (). The name of Lake Päijänne comes possibly from a Pre-Finno-Ugric substrate language. Transportation Päijänne is a famous boating, canoeing and sailing attraction. The long lake is connected by canals to Lake Keitele, Lake Vesijärvi and to Lake Ruotsalainen. Length of the open waterway for ships is . Construction of canals connecting Päijänne to the Baltic Sea has been discussed for decades. Nevertheless, the plan is still to be materialized. Until the 1940s Lake Päijänne was a major transportation channel in the Central Finland. Numerous ships transported passengers and freight between the villages and cities on the shores of Päijänne. Nowadays, passenger transportation is rather a tourist attraction on the lakelands than the fastest way connecting the cities and villages. One of the most popular passenger transportation routes in summertime is between the cities of Lahti and Jyväskylä. Tourism There are 16,000 cottages on the shores of Päijänne. Most of the cottages are private owned and have a separate sauna cottage. In addition to cottage tourism Päijänne attracts fishing, sailing, canoeing, rowing, paddling, trekking, ice-skating, snow mobile and nature tourists. The National Parks of Päijänne and Leivonmäki alone has tens of thousands of visitors every year. The Clear and Drinkable Lake Päijänne South Association won a Tourism and Environment award presented by the European Union Commission in 1995. National Parks Päijänne National Park () is a national park in the southern parts of Lake Päijänne. It consists of 50 unbuilt islands and parts of inhabited islands. The national park has been established in 1993 and has an area of . Leivonmäki National Park is situated few kilometres North East from the Northern part of Lake Päijänne.