Ключевые слова: architecture, ascent, berlin, bvg, child, cleaned, climb, comfortable, concrete, danger, descent, entrance, escalator, fall, granite, handrail, height difference, landings, lighting, man, nonslip, outside staircase, people, platform, railing, railings, reinforced concrete, run, slide, stair railing, staircase, staircases, stairs, step, steps, subway station, subway stop, surefooted, theodorheussplatz, tiles, tourists, up, upward, woman, working,