Ключевые слова: arch, architecture, arizona, bridge, bridge built structure, built structure, canyon, cliff, color image, concrete, construction, construction industry, dam, electricity, engineering, famous place, gorge, green, high, highway, horizontal, lake, landmark, landscape, landscape scenery, modern, mountain, nature, no people, outdoor, reservoir, river, road, rock, scenic, scenics nature, sky, steel, structure, summer, technology, tourism, transportation, travel, tree, usa, vacation, view, water,