After the boat sailing the Danube from Passau to Linz passes Engelhartszell, the valley now becomes still narrower and with little human habitation. Then, after the great loop known as the Schlögener Schlinge, the scene changes, and the boat sails past a series of friendly little holiday villages such as Obermühl and Neuhaus, the latter with an old castle looming over it, a conspicuous landmark.