There is a a charming natural phenomenon that the rivers water or ocean and seas water can't be mixed, you can see this in the following photos. These rivers are the Rhône and Aar rivers, they are two of the major rivers in Europe which meet each other in Geneva, Switzerlan.
Rhône river Is one of the major rivers in Europe, stems from Switzerland and is in southeast France a total length of 812 km, and near its mouth in the Mediterranean Sea is divided into two sections: The first section defines Balron great (in French: Grand Rhône), and the second branch is known Balron small (in French: Petit Rhône), is thus the result of a fork of the river delta in the Camargue region.
Rhône river Is one of the major rivers in Europe, stems from Switzerland and is in southeast France a total length of 812 km, and near its mouth in the Mediterranean Sea is divided into two sections: The first section defines Balron great (in French: Grand Rhône), and the second branch is known Balron small (in French: Petit Rhône), is thus the result of a fork of the river delta in the Camargue region.