Ключевые слова: america, american, amphibious, architecture, attraction, boat, boston, building, bus, car, city, day, downtown, duck, excursion, famous, harbor, historic, historical, history, landmark, ma, massachusetts, old, people, retro, ride, river, road, sightseeing, siteseeing, state, states, street, tour, tourism, tourist, tours, traffic, transport, transportation, travel, trolley, truck, united, urban, us, usa, vehicle, vintage,