Ключевые слова: architecture, background, blue, bridge, buildings, business, center, chicago, city, cityscape, clouds, color, commercial, concept, day, district, downtown, estate, financial, grass, industrial, lamp, landmark, lawn, lights, luxury, metropolitan, modern, new, office, outdoor, panorama, park, real, river, scenic, sidewalk, skyline, skyscraper, tourism, tower, town, travel, trees, urban, usa, view, walkway, windows,