Today's National Park Poster Project taps into the vintage vibe of the 1930s when the WPA urged Americans to visit our parks and experience the great American outdoors.
원문출처 : https://www.cnn.com/travel/article/national-park-service-posters/index.html
원문출처 : https://www.cnn.com/travel/article/national-park-service-posters/index.html