Ключевые слова: blue, building, building construction, business, chicago, chicago skyline, city, cityscape, clear, concrete, condominium, construction, construction background, construction site, corporate, crane, crane construction, development, downtown, downtown chicago, dusk, financial district, glass, highrise, hotel, illinois, industrial, lamp post, light, looking up, metropolis, modern, office, office building, site, sky, skyline, skyscraper, skyward, street, sunset, tall, tower, tower crane, tree, upward, urban, usa, vertical, work,