I was lucky enough to visit New Zealand ten years ago and personally consider it to be the most beautiful place on earth. Therefore it was surprising to discover that it is a close rival to the UK as a source of boring postcards.
This is the best one for me - Lyttelton Road Tunnel. It's the longest road tunnel in New Zealand linking Christchurch to the sea port of Lyttelton. Clearly they're very proud of it but on a postcard????
I now have an article on Squidoo about my hobby - if you want to have a look it's at http://www.squidoo.com/boringpostcards