Ключевые слова: ancient, architecture, background, building, city, clean, concrete, construction, corridor, dark, design, empty, entrance, floor, handrail, indoor, inside, interior, light, modern, new, nobody, old, passage, perspective, room, stair, staircase, stairs, stairway, steel, step, subway, travel, tunnel, underground, underpass, up, urban, utility, vault, walk, walkway, wall, way, white,