Unique Lake Saimaa Lake Saimaa is the fourth largest fresh water lake in Europe and the largest lake in Finland, connecting many of the larger towns of Finnish Lakeland. Lake Saimaa's sparkling, pure waters are dotted with 14 000 islands, making it a winding labyrinth filled with breathtaking scenery and the purest nature. Whichever way you are travelling, Saimaa is sure to show you its charms, on water and land alike. Saimaa spirit is the purest Finland. It is water, nature, culture, history – it is us. It is you. Welcome.