It's well worth the 11 CHF/person. Probably only place in the world you can see a river running through a slot canyon in the side of a mountain. The roar of the flowing water is quite impressive. To get from Lauterbrunnen to Gimmelwald we walked from Lauterbrunnen to Trummelbach, then took the bus from Trummelbach to the cable car to Gimmelwald. Could probably walk from Trummelbach to the cable car but it was raining and the road didn't have much of a shoulder.