Chicago cityscape, architectural landmarks, Willis Tower, Navy Pier, boat tour, sunny day, clear blue sky, Lake Michigan waters, calm waves, seagulls flying overhead, people on the boat, smiling faces, sunglasses, casual clothing, life jackets, boat's white canopy, wooden benches, captain at the helm, tourists taking photos, city skyline in the background, panoramic view, wide-angle lens, warm natural light, vibrant colors.