The "Katzenkopf" tank factory, built between 1937 and 1939, is the northernmost and one of the few tank factories of the former Westwall that can be visited.
Vianden Castle was built between the 11th and 14th centuries on the foundations of a Roman fort and a Carolingian refuge. Influenced by the Hohenstaufen family, the castle palace is one of the largest and most beautiful feudal residences of the Romanesque and Gothic periods in Europe.