Originally Posted by
michal
train from FRA - years ago there was a "scenic route" by IC/ECs - following the river. I think today´s ICE are going straight line...
There still is a route along the Rhine, so long as you take the (slower and cheaper) train that goes via Mainz and Koblenz.
It is served by the more "traditional" express trains called IC, EC and some of the first generation ICEs. As noted in post #6 above, these trains cannot use the newer dedicated high-speed track.