Interlaken is an amazing place to visit. The town is small and takes you away from the commotion of the city. It is only of the most beautiful places I have ever been. There are tons of activities that are perfect for someone who loves the outdoors. You can hike up to other small towns and enjoy the fantastic views. There are also great outdoor sports to experience. I was visiting before many places opened up for the tourist season which made many places very quiet.
Insider Tip:The Avocado Bar in Grindelwald is a great place to stop in for a drink and hang out with some music. The Happy Inn Lodge is a great place to stay with a fantastic bar as well. Alpin Raft is an amazing place to book for white water rafting. The staff is so fun and nice.