Ключевые слова: abstract, art, background, birch, blue, botany, bulgaria, bush, capital, christmas, city, cityscape, cloudy, cold, color, colorful, design, environment, europe, forest, green, ice, january, lake, landmark, leaf, leaves, nature, plant, red, reflection, relax, river, scene, scenic, season, sight, sightseeing, skyline, snow, sofia, travel, tree, white, wind, winter,