Chicago architecture tour, daytime, sunny sky, Willis Tower, reflection in glass windows, steel frames, stone columns, Gothic Revival style, ornate details, intricate carvings, modern skyscrapers, bustling streets, people walking, cameras and selfie sticks, tourist guide holding a flag, audio equipment, sunglasses, summer clothing, casual wear, baseball caps, backpacks, water bottles, city buses driving by, street performers, vendor carts, Lake Michigan shoreline in the background, soft focus on distant buildings, shallow depth of field, warm natural light, vibrant colors.