Chicago Architecture Tour, daytime, sunny weather, clear blue sky, Willis Tower, reflective glass and steel skyscraper, intricate stone carvings, art deco details, crowded streets, tourists with cameras, maps and guides, yellow cabs driving by, street performers, Millennium Park, Cloud Gate sculpture, Lurie Garden, vibrant flowers, walking paths, modern cityscape, dramatic clouds, low-angle shot, wide-angle lens, high-contrast lighting.