Ключевые слова: africa, arch, architecture, background, baviaanskloof, beautiful, blue, concrete, construction, dam, electric, electrical, electricity, energy, engineering, environment, green, hydro, hydroelectric, industrial, industry, itaipu, japan, kariba, khao, kurobe, kuroyon, lake, landscape, loerie, modern, mountain, national, nature, paraguay, park, plant, power, reservoir, river, scenery, sky, sok, structure, tourism, toyama, travel, variableradius, view, water,