Ключевые слова: adventure, alpen, architecture, board, bridge, channel, concrete, connection, construction, cross, danger, footbridge, green, hanging, high, highway, holiday, landscape, link, mountain, national, nature, outdoor, park, people, perspective, river, rope, steel, summer, suspended, suspension, susten, tourism, trail, transportation, travel, tree, walk, walkway, water, way, wood, wooden,