Finnish lake district

Finnish Lakeland or Finnish lake district (Finnish: Järvi-Suomi, "Lake Finland", Swedish: Insjöfinland) is the largest of the four landscape regions into which the geography of Finland is divided.

The hilly, forest-covered landscape of the lake plateau is dominated by drumlins and by long sinuous eskers. Both are glacial remnants after the continental glaciers that scoured and gouged the country's surface receded about 10,000 years ago.

The lake basins of the lakeland originate from the joint work of weathering and erosion of fractures in the bedrock. The erosion that made the depressions occurred before and during the Quaternary ice ages. Erosion along fractures has produced linear inlets among the lakes.

The district occupies most of the central and East Finland and is bounded to the south by the Salpausselkä Ridges. These ridges are terminal moraines, which trap networks of thousands of lakes separated by hilly forested countryside.

The lake district turns into the Coastal Finland district to the West and Northwest, and is bounded by the Upland Finland to the North.

The lake landscape continues to the East and extends into Russia (Karelian Isthmus and Republic of Karelia). As a consequence, there is no natural border between the two countries.

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