Bielerhöhe and Silvretta Reservoir

At the Bielerhöhe (2,032m/6,667ft), on the boundary between Vorarlberg and Tirol, lies the huge Silvretta reservoir, 2.5km/1.5mi long and 0.75km/0.5mi wide, with a dam 80m/260ft high, 52m/170ft across and 430m/470yds long. It takes some two hours to walk round the reservoir.