Ключевые слова: adult, aerial, architecture, attraction, balcony, building exterior, built structure, casual clothing, chicago, city, city life, cityscape, copy space, day, floor, glass, glass material, group of people, high, illinois, landmark, ledge, men, modern, observatory, people, platform, real people, risk, sears tower, sensation, sky deck, sky deck ledge, standing, sunlight, togetherness, top, tourism, tourist, transparent, travel, urban, urban scene, view, viewpoint, willis tower, window, women, young, young adult,