Chicago River, architectural tour, daytime, sunny weather, blue sky with few clouds, modern skyscrapers, reflective glass and steel buildings, Willis Tower, Navy Pier, boat cruise, cityscape, urban landscape, busy streets, people walking, iconic bridges, ornate stone carvings, intricate ironwork, Gothic Revival style, Beaux-Arts style, Renaissance Revival style, Art Deco style, close-up of architectural details, wide-angle shot, low-angle shot, dramatic lighting, high-contrast, vibrant colors.