Chicago cityscape, architectural tour, daytime, sunny weather, clear blue sky, Willis Tower (Sears Tower), glass and steel skyscraper, modern urban landscape, busy street scene, people walking in all directions, double-decker bus, American flags waving, iconic "L" train tracks, historic buildings with ornate details, Wrigley Building's bright white terra cotta exterior, Tribune Tower's Gothic-inspired architecture, Michigan Avenue Bridge, Lake Shore Drive, reflective windows, urban canyon, low-angle shot, wide-angle lens, sharp textures, vibrant colors.