P.S.: It's official: UNESCO now created their own GoogleEarth set! It is available here: http://whc.unesco.org/en/list/kml/ (in french: http://whc.unesco.org/fr/list/kml/ ). It is nicely done, and, of course, first hand data! You'll find some similarities, I think . What's missing, are the sub-sites of properties with multiple locations. So I think, I'll still continue my work for a while - you decide which version you like !