Lake icon and warmest bathing lake in Europe! Lake Klopeiner See is the largest, best known and warmest of the 7 ½ lakes in southern Carinthia. It is the warmest bathing lake in Europe and, with its extensive range of water sports and leisure activities in, on and around the lake, is known as a true jack-of-all-trades. With Austria's only continuous lake promenade and excellent water quality, it is perfect for swimming, strolling, sports or wellness. Around the lake there are numerous private and public beaches – each one unique and special in its own way.