Ключевые слова: adventure, alpen, alps, board, bridge, construction, cross, danger, europe, footbridge, green, hanging, high, hiking, holiday, landscape, mountain, national park, nature, outdoor, perspective, river, rope, shaky, sky, summer, suspended, suspension, susten, swinging, switzerland, terrain, timber, trail, tree, walk, walkway, water, way, wood, wooden, woods,