The So Called „blue Danube“, With Countless Historic Cities and Grand Buildings Along Its Riverside Was for Long-ages Centre of the Austrian-habsburgs Empire: Passau, Linz, St. Florian Monastery and Klosterneuburg as Well as the Residence City of Vienna With the Splendid Schönbrunn Palace. The Magnificent Wachau Valley, UNESCO World Heritage Since 2000 is Situated Amidst and Enchants Its Visitors With Picturesque Vineyards and Impresses With Its Dominant Benedictine Abbey in Melk.