The Great barrier reef, Australia
sources:
http://www.talismancoins.com/servlet/Detail?no=1206
http://www.danstopicals.com/santiago.htm
http://museumvictoria.com.au/collections/items/247126/ticket-bicentennial-wool-collection-australian-wool-corporation-1988
http://www.canadapost.ca/cpo/mc/aboutus/news/pr/2014/2014_unesco_world_heritage_sites.jsf