The largest island in the world and the card gives the latitude and
longitude (also helpfully marking the arctic circle) so perhaps one could plot a route to Greenland. There will be no trouble finding a post
office because that is what all the red dots are around the coast on the postcard. Nuuk on the south west coast is not only Greenland's capital but the home of the giant Santa Claus Post Box
Image from Wikipedia
where letters to the jolly gentleman are gathered all year round. Razlan from Hong Kong also called in to the nearby tourist post office and shared his photo on Flickr here Of course another way to 'visit' Greenland is by post and this is what one Canadian postal enthusiast is doing with post office cover cancels here.