On its way through Lower Austria from the west, the first region the Danube flows through is Wachau-Nibelungengau-Kremstal. The Nibelungengau is to the west of the Wachau, between Ybbs and Melk, and is about 30 km long.
The Danube then flows through the Wachau, the UNESCO World Heritage landscape between Melk and Krems (about 40 km long).
After that the Danube passes Krems Valley (Kremstal in German). The Krems Valley extends from Krems, Senftenberg, Rohrendorf and Gedersdorf to Furth and Mautern.