Lake Päijänne is the second largest lake in Finland (1,080 km2 (266,874 acres)). 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 in Päijänne (95.3 m or 313 ft).
