When UNESCO launched its World Heritage program in 1976, there were no camera phones and no low-cost airlines.
원문출처 : http://edition.cnn.com/2015/02/03/travel/unesco-global-treasures-back-stories/index.html?eref=edition
원문출처 : http://edition.cnn.com/2015/02/03/travel/unesco-global-treasures-back-stories/index.html?eref=edition