Considering the Hotel Bastian in Koblenz?
A VT member wrote the following comment about visiting Koblenz:
Festung Ehrenbreitstein by Mariajoy
A small ferry takes you across to the other side of the Rhein where you can either walk or take the chair lift to the top of the hill where the Fortress stands. From here you can get the very best views of the Deutsches Eck.