Ключевые слова: abstract, architectural, architecture, background, blue, building, business, city, clean, concrete, construction, contemporary, design, detail, down, empty, floor, glass, hand, handrail, home, house, inside, interior, ladder, metal, modern, nobody, office, outlook, rail, railing, railings, safety, shape, spiral, stainless, stair, staircase, stairs, stairway, steel, step, steps, structure, up, walkway, wall, way, white,