Switzerland is GORGEOUS! I went to Bern & Laussane, and although they were gorgeous, there really isn’t much to do. Bern’s claim to fame is a hole with some bears in it…....seriously. Good luck!
If you are planning to go the Interlaken and Gimmelwald, make sure you also go to Murren and Grindelwald. Murren I think has to be one of the prettiest and littlest towns in Europe, I loved it there! I just spent a week in Interlaken with some family touring around all that area, it is such an amazing place! I just got back from there less than a week ago.
Hey! You’re very lucky…I want to go back o Switzerland so badly! haha…I love Switzerland, though I may be a bit bias because I am part Swiss…haha…but anyway, go to Zurich for sure, Lucerne and definitely Bern (big city and a bit expensive, like everywhere in Switzerland, but worth a visit). They are beautiful places, and much prettier than Geneva. Also there is a town in the Alps called Wald. If you want a good ski town then Arosa is a great one! Have a great time! Let me know if you need any more suggestions or any questions answered! :)