At 1 kilometre west of Esch-sur-Sûre, in the heart of the Upper-Sûre Natural Park, lies the Upper-Sûre Lake, dammed up in 1961. The lake with its 380 ha not only provides drinking water supplies and generates electricity, but is also much in demand as a leisure facility. Apart from the protected area for drinking water supplies, which stretches back some 5 km from the main dam (please comply with the notices), a range of watersports are possible (swimming, canoeing, diving, windsurfing and sailing). Do not forget to make a trip on the solar boat. Motor boats are not allowed here.