Ключевые слова: alternative energy, american culture, arizona, black canyon, blue, boulder canyon, built structure, clear sky, color image, colorado river, concrete, dam, day, energy, famous, famous place, fuel and power generation, high angle view, hoover dam, horizontal, hydroelectric power, hydroelectric power station, international landmark, lake, lake mead, landmark, landscape, nevada, outdoors, panoramic, power station, renewable energy, reservoir, river, sky, southwest usa, usa, water, wide angle,