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Lake Saimaa in Southeastern Finland
This is Finland’s biggest lake and Europe’s fourth largest natural freshwater lake. It is also one of the world’s oldest, as it is said to have formed because of glacial ice melting upon the conclusion of the Ice Age. During summer, it’s a nice idyllic spot for lake cruises, but fishing is usually discouraged, especially of the endangered Saimaa salmon. During winter, its beauty becomes of another sort entirely as underneath its frozen surface you can see various sorts of shapes, sizes, and patterns of ice blocks.