Travel Trivia Tuesday 44

Well Done Sven, the answer to last week's question was indeed Freddy Mercury, and it was taken in Montreux in Switzerland, well done! Now for this week's question...Switzerland has many beautiful lakes which offer tranquil surroundings as well as chalets for rent which you can enjoy travelling to via a car hire. You can find lakes of all kinds, shapes and sizes for example, Lake Constance borders Germany and Austria which is a freshwater lake that supplies water for south west Germany, or Lake Zurich which is controlled by the Rapperswil Dam. What we want to know is what is the name of the lake in Switzerland which has the largest body of freshwater in continental Europe?