For a special occasion or a luxurious splurge, consider a stay at the Victoria Jungfrau, the grande dame of Interlaken hotels, dating back to the 1800's. This elegant and luxurious 5 star property is know for its phenomenal spa - considered by many to be the best in Switzerland. A wonderful massage to relax your muscles after a day in the mountains is the perfect way to pamper yourself. The hotel's location is perfect, facing the large park in Interlaken. Rooms facing the Jungfrau are the most expensive; however if you have a balcony overlooking the park you can amuse yourself watching the paragliders land just steps away. In the fall, when the cows are down from the mountains, you'll also actually see cows grazing across the street in the large park.
Even the mid priced rooms are large and feel luxurious. A fresh orchid plant on the desk was a nice touch. You'll melt into their soft, comfortable beds and sleep like a baby under the puffy down comforters (a Swiss classic at most hotels).
The large, if pricey, breakfast buffet will easily carry you until dinner with just a light snack mid day. Service is refeshingly friendly and not stuffy as it often is at upscale hotels. I was welcomed warmly despite my jeans and travelers backpack.
You can spend your days in the small mountain villages above Interlaken (easily accessible by train) and still enjoy gourmet dining with 5 star service in the evening. Blue jeans by day and elegant, or casual elegant dress in the evening. Great combination! For evening dining, men would want a jacket. However, if you're not the jacket type, there are many casual restaurants right outside your door.
Whether you stay here or not, it's definitely worth a drink at one of the bars and a walk through the hotel to admire the artwork. This is a classic!