Ключевые слова: abstract, architecture, art, background, black, bright, cement, city, concept, concrete, construction, dark, design, detail, down, empty, entrance, europe, exterior, floor, granite, industrial, interior, light, metro train, modern, night, old, outdoors, pattern, perspective, railing, railways, square, stair, staircase, stairs, stairway, step, stone, street, structure, subway, texture, underground, urban, walk, walkway, wall, way,