Ключевые слова: april, background, beauty, boris, borisova, borisova gradina, bulgaria, city, cityscape, climate, cloud, environment, europe, forest, garden, gradina, green, lake, landmark, landscape, leaf, leisure, meadow, mountain, nature, outdoor, park, relax, scene, scenic, scenics, season, sky, sofia, spring, tourism, travel, tree, tsar boris iii, urban, vacation, walkway, weather, wind, woodland,