Ключевые слова: adventure, attraction, buildings, center, chicago, city, construction, deck, empire, falling, fear, feet, fields, first person perspective, floors, glass, height, heights, legs, observation, paragliding, phobia, plexiglas, safety, sandals, scenic, sears, shoes, sightseeing, skyscrapers, story, tall, thrill, top, tourist, tower, trade, urban, world,