Lake Sils is the largest lake in Graubünden and, together with lakes St. Moritz, Silvaplana and Champfèr, forms the Upper Engadine chain of lakes. During the summer months, Europe’s highest passenger boat service operates on lake Sils.
Lac de Joux in the Vaud Jura is located at 1,000 metres in the valley of the same name (Vallée de Joux). The stark beauty and unspoilt nature of the high valley and the lake attract countless visitors all year round; in summer mainly for water sports, biking and hiking and in winter for ice-skating and cross-country skiing.
The idyllic hilly countryside around the lake, the medieval castle of Hallwyl with its heritage exhibitions, and the romantic boat trips round the lake make Lake Hallwil and the nearby Seetal valley a small but popular tourist area.