At http://whc.unesco.org/en/list you find the official list of all of the UNESCO World Heritage List. The World Heritage List includes 936 properties forming part of the cultural and natural heritage which the World Heritage Committee considers as having outstanding universal value. These include 725 cultural , 183 natural and 28 mixed properties in 153 States Parties. As of March 2012, 189 States Parties have ratified the World Heritage Convention.
This contest is about showing us something which is on this list, in the description (or as title) you must tell us what the subject is called and give us a link to the wiki-page about this subject.