Ключевые слова: architecture, background, beautiful, beauty, blue, bulgaria, clouds, copy, environment, field, forest, grass, green, high, hill, horizon, horizontal, landscape, looking, mountain, national, natural, nature, nobody, observation, outdoor, panorama, park, point, post, river, rock, scenic, sky, stone, strandja, strandzha, structure, tourism, tourist, tower, travel, tree, vacation, view, wildlife, wood, wooden, young,