wow, switzerland is one of my favourite country to visit! I hope that my sharing is not too late for you.
I had been to a little town named Murren where is just another connecting rail from Lauterburner. I stayed at a small hotel with my balcony facing the valley. I enjoyed the view of the mountain top! I still remember the name of the hotel is Alpine.
Besides, there is a big fall at Lauterburner. I took a 45 mins leisure walk all the way from the rail station to the fall. Its really interesting.
By the way, I was advised to buy the swiss holiday pass. For which you can have discount on railway and boat trip. The boat trip at Interlaken is very enjoyable.