Ключевые слова: amtrak, arc, architecture, busy, capital, city, columbia, columbus, column, commute, commuter, dc, design, district, eagle, editorial, entrance, gold, headquarters, hub, infrastructure, landmark, marble, metro, public, rail, railroad, railway, ride, sightseeing, states, station, statue, stone, symmetry, tourism, tourist, train, transit, transport, transportation, travel, union, united, urban, us, usa, visit, visitor, washington,