Clervaux Clervaux Clervaux lies in a narrow Clerve valley at the northern tip of the country, with the white castle in the middle of town and the Benedictine abbey of Saint-Maurice on the slope. The castle houses the exhibition The Family of Man by Edward Steichen, listed by UNESCO in the Memory of the World programme, as well as the museum of the Batalha das Ardenas. There is a train station on the line from the capital to Liège.