This seems to be a very general question, I suggest you take a look at the Project Management Process series of articles (link is provided below, or on the side).
A World Heritage Site is a site of significant cultural or natural importance. There are over 1000 of these to this day. World Heritage Sites are managed by UNESCO, the United Nations Educational,...
World Heritage Sites are managed and listed by UNESCO, the United Nations Educational, Scientific and Cultural Organisation. 911 sites have been listed as of 2010.