The Rhine is the longest and largest body of water in Liechtenstein. With a length of approximately 27 kilometers, it represents the natural border with Switzerland and is of great importance for Liechtenstein's water supply. Furthermore, the Rhine is an important recreational area for the population. At 10 kilometers, the Samina is the second longest river in the Principality. The troubled river begins at Triesenberg and flows into the Ill in Austria (near Feldkirch).