trummelbach falls, interlaken, bern canton, switzerland, waterfall in the mountain of lauterbrunnen valley

alpine alps attraction background bern bernese canton canyon cascade cave chute corkscrew corroding destination eroding erosion europe fall falls flow formation geology gorge holiday interlaken landmark landscape lauterbrunnen meandering mount mountain natural nature outdoor power raging rock splash stairway stone stream suisse swiss switzerland tourism tourist travel trip trummelbach underground vacation valley water waterfall