Should we focus on Gstaad, Zweisimmen, Interlaken, or Grindelwald? We will have spent one night already in Zermatt!
You can take a look at our Montreux page, where you'll find several suggestions. Interlaken and Grindelwald are pretty far away (see the timetable). If you only stay a few days, there's plenty to do and see nearby.
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