The railroads that once helped build the United States today still carry thousands of people across the country on journeys of business, discovery and pleasure.
원문출처 : http://www.cnn.com/2017/03/31/travel/amtrak-trains-us-photos/index.html
원문출처 : http://www.cnn.com/2017/03/31/travel/amtrak-trains-us-photos/index.html