Ключевые слова: aragon, blue, canyon, cliff, clouds, concrete, country, countryside, dam, danger, dike, dyke, ecology, effect, engineering, europe, fence, filter, forest, hill, hydraulic, industry, infrastructure, irrigation, lake, landscape, mountain, nature, outdoors, reservoir, river, road, rocks, rural, scenic, sky, spain, summer, supply, swamp, tourism, travel, utility, valley, view, water, weir,