Ключевые слова: abstract, april, art, background, beauty, bench, birch, blue, botany, bulgaria, capital, color, colorful, design, different, environment, flower, forest, fountain, green, idea, kind, lake, landmark, leaf, leaves, maple, nature, orange, park, people, plant, red, reflection, relax, river, season, sight, sightseeing, sofia, south, south park, spring, tree, urban, white, wind, yellow,