Chicago River, cityscape, architectural landmarks, sunny day, blue sky, reflection on calm water, Willis Tower, Tribune Tower, Wrigley Building, modern skyscrapers, historic buildings, ornate details, stone walls, glass windows, steel frames, riverwalk, walking path, blooming trees, greenery, sailboats, kayaks, people taking photos, guided tour, panoramic view, wide-angle shot, vibrant colors, high contrast, sharp lines.