There isn't anything to do here at Interlaken (according to Yahoo Travel Adviser).
But from what people said about Interlaken, there are certain points of interests we might like to see;
1. Jungfraujoch and we can take the Jungfraubahn to Jungfraujoch, the highest train-station in Europe - it is also called "Top of Europe". Also the points of interest in the area : 1)The Sphinx-viewpoint in a height of 3571 meters. 2)The Ice-palace with various ice-sculptures 3)a small museum of the Jungfraubahn 4)various restaurants, gift-shops and an e-mail-terminal 5)the gate to the glacier, where you may hike to Moenchsjochhuette, go skiing or ride with the sledge-dogs
2.Staubachfall is another attraction in the south of Interlaken, in a distance of just 500 meters from the trainstation in Lauterbrunnen.
3.The Truemmelbach-falls in Lauterbrunnen are certainly worth a half-daytrip. These waterfalls are quite unique and they are also listed as a UNESCO-World-heritage:
4. Japanese Garden of Friendship
5. Brienz is a great place for a day-excursion.