UNESCO World Heritage Sites comprise a breathtaking panorama of our world's greatest treasures, both natural and man-made, now encompassing sites in 167 countries. To be familiar with even a sampling of these sites is to appreciate and understand the masterworks of human endeavor down through history, as well as our world's most extraordinary natural wonders. Join with fellow lifelong learners to see 12 of these sites this term.  This is a Great Course presentation.