The Inn valley is nice, although since you'd be going uphill you'd probably want to get on a train before you left Austria and look at the scenery through a train window. Then get off in Switzerland and go down the Rhine.
@Five-Hats started
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The Inn valley is nice, although since you'd be going uphill you'd probably want to get on a train before you left Austria and look at the scenery through a train window. Then get off in Switzerland and go down the Rhine.