Chicago River, sunset time, calm water reflecting city skyscrapers, Chicago Architectural Foundation boat, people on board, guided tour, knowledgeable guide speaking through a microphone, passengers wearing life jackets, sunglasses, holding cameras, riverbank lined with willow trees, ornate bridges overhead, Wrigley Building, Trump Tower, Aqua Tower, modern glass and steel buildings, historic landmarks, vibrant city lights, soft warm ambient lighting, panoramic view, wide-angle lens.