I actually had the pleasure to cruise on the Danube on a ship very similar to this a few years ago. It is so great. You can just relax on the deck and watch the beautiful scenery pass by. Really a great experience.
So this photo is taken opposite Durnstein in Austria. Really one of the most beautiful views in the area. I tried a little different type of editing here, so this is not HDR, as all edits were done just using Photoshop and Color Efex. But as there was not such a huge dynamic range here, there was no need for HDR anyway :)