Ключевые слова: america, arizona, boulder, california, canyon, color, colorado, concrete, dam, death, desert, dry, dune, electric, electricity, energy, engineering, environment, famous, generation, hoover, hot, hydro, hydroelectric, lake, landmark, landscape, mead, mountain, national, nature, nevada, outdoors, park, power, reservoir, river, rock, sand, scenic, sky, southwest, structure, summer, tourism, travel, usa, valley, view, water,