There are so many outdoor activities to partake in. I wish the weather was better because Interlaken is breathtakingly gorgeous.
Insider Tip:To go to Jungfrau, the Swiss pass covers to Grindelwald. The discount for Jungfrau is NOT 50% like the other mountain railroads. Only go up to the top on a very clear day. Otherwise, the day is much better spent hiking the valley below.