The Botnur power plant, in the valley north of Vágur, was the first hydroelectric station in the Faroe Islands and one of the longest continuously operating power plants in the country. It draws water from a small mountain reservoir above the valley through a pipeline to a turbine house at sea level; the head is about 200 metres.
The site is on the road from Vágur to Hvalba and can be visited from outside without difficulty. The dam, the pipeline, and the power house together make for a striking industrial landscape against the green of the valley sides. The interior is not normally open to visitors.