Ключевые слова: 4014, america, american, antique, big, boy, car, city, colorado, denver, diesel, engine, famed, freight, historic, historical, history, industrial, landmark, locomotive, pacific, passenger, power, rail, railroad, railway, road, site, states, station, steam, technology, tour, tourism, town, track, train, transit, transport, transportation, travel, union, united, urban, usa, vehicle, vintage, visit,