Grein is a charming small town, just big enough to explore but small enough to do it easily on foot in a day. Castle Greinburg is not only a landmark but also very beautiful inside.
Thousands of photos taken on two trips down the Danube (first trip starting at Calais, France and the second trip from Vlissingen, Netherlands, both all the way to the Black Sea) have been used to create the EuroCanals PhotoNav Guides for the Danube. They include the photos shown on this website.
In full-page format they display the details of landmarks along the route, in a km-by-km sequence. The photos are identified by kilometer post; they include ports, bridges, locks as well as sites worth noting. Examples are described on this page:
View a sample guide as a slideshow: