Chicago Architecture Foundation River Boat Tour, summer afternoon, sunny sky, gentle Lake Michigan waves, sleek modern riverboat, wooden deck, steel railings, comfortable cushioned seats, knowledgeable guide, microphone, Captain's hat, sunglasses, tourists taking photos, Chicago cityscape, Willis Tower, John Hancock Center, Navy Pier, Tribune Tower, Wrigley Building, Marina City, Aqua Tower, reflective windows, steel and glass skyscrapers, riverwalk, pedestrian path, lush greenery, vibrant flowers, soft natural light, panoramic view.