A train transfer from an entry point of choice (e.g. Zurich airport or Geneva at the border) to Montreux on Lake Geneva.
You'll travel from Interlaken via Spiez to Brig. There you'll change to the Glacier Express. The Oberalp Pass and Rhine valley will pass by your panoramic train window. The night will be spent in the old town of Chur.
Again, a wonderful train trip: the Bernina Express across the Landwasser viaduct and via the Bernina Pass to Tirano, Italy. You'll return to Chur to spend another night there.
A train transfer from Chur to your preferred point of departure.