Vianden Vianden Vianden lies in the valley of the river Our, on the border with Germany, on a steep hillside dominated by the castle of the counts of Vianden. The main street descends from the castle to the bridge, where the house in which Victor Hugo stayed in 1871 is located. A chairlift cable car climbs the hill opposite, with views of the castle and the valley. It is the most visited town in the Luxembourg Ardennes.