Chicago-style skyscrapers, Willis Tower, reflective glass windows, metallic frames, historic buildings along the river, Lake Michigan shoreline, sunny day, clear blue sky, few white clouds, sailboat tours, wooden docks, nautical ropes, life rings, map in hand, tourist holding camera, casual wear, sunglasses, happy facial expression, sitting on boat deck, Chicago Riverwalk, cityscape view, low-angle shot, warm lighting, vibrant colors, urban landscape.