Flickr has a group for photographs of UNESCO World Heritage Sites, but there is nothing yet for postcards. Postcrossing has a very active trading forum for UNESCO cards and there are many cards of UNESCO WHS's in the general Postcards groups here on Flickr, so it seems to be a good idea to have a Flickr group just for WHS's. All of your UNESCO postcards are welcome here. It would be great if you could also name or describe the site and link (geotag) it on a map.
