Ключевые слова: abstract, asphalt, backdrop, background, brickwork, cement, centre, city, cobble, cobblestone, concrete, copyspace, ecology, environment, gray, grey, made, masonry, material, multiple, native, nature background, outdoors, pattern, pavement, paving, picture, rock, sample, scenery, shapes, sidewalk, slab, stair, staircase, stairway, steps, stone, surface, texture, walkway,