Ключевые слова: alone, background, bare, black, black and white, branches, bulgaria, bulgarian nature, cold, coldness, day, europe, explore, flora, fog, foggy, foggy day, frost, hill, krone, landscape, leafless, lonely, meadow, minimal, minimalism, naked, nature, no leaves, nobody, oak, one, one tree, ordinary, outdoors, outside, plant, season, seasonal, shape, sight, silhouette, single, snow, snowy, travel, tree, walk, white, winter,