evidence: Lake Constance is a stunning freshwater lake located at the northern foot of the Alps, bordered by Germany, Austria and Switzerland. Lake Constance and is the second largest freshwater lake in Central Europe, covering an area of approximately 536 km². Lake Constance is not only a geographical crossroads, but also an oasis of natural beauty, cultural richness and recreational activities. [...] Lake Constance has two almost separate parts - the Upper Lake and the Lower Lake. The two parts are connected by the Seerhein, a short section of the Rhine that flows through the city of Konstanz. [...] Local Communities 3,9 million People live, work and relax in the Lake Constance region, which covers an area of around 12.500 square kilometers. 4,5 million People drink Lake Constance water and up to 50.000 boats are based on the lake.