Vianden Castle is one of the most impressive fortified residences in western Europe, perched on a rocky promontory above the town and the Our valley. Construction began in the 11th century on Roman foundations and continued through the 14th century, producing a complex of Romanesque and Gothic buildings around a central great hall.
The castle is fully restored and the interior is open to visitors year-round, with furnished rooms, a Romanesque chapel, and a Gothic great hall that gives a good sense of medieval palatial architecture. The views from the ramparts over the Our valley and the wooded hills of the Ardennes are excellent. Allow 1.5 to 2 hours for a proper visit.