UNESCO World Heritage sites – A UNESCO World Heritage site is a place (such as a monument, building, forest, lake, desert, city or complex,) that is listed by UNESCO (the United Nations Educational, Scientific, and Cultural Organization) as of special cultural or physical significance to humanity. There are currently 962 sites; and are as far-flung and diverse as the Great Barrier Reef (Australia,) Angkor (Cambodia,) The Summer Palace (China,) and Petra (Jordan.)