Hmmmm...
You have to check out Whanganui bay and Te Kuiti! (Both climbing places, but if you don't have any gear Whanganui bay is a beautifull place anyway, right on the lake with a lovely beach and bush and clifts, Te Kuiti might not be quite as much fun without be able to climb anything, but if you have gear it is AWSOME!
Also got to go snorkling or diving at Goat Island Marine Reserve (North of Auckland). The fish are so friendly and so BIG :) And when you up that way check out the Kauri trees and give them a big hug for me :) (yes I am unashamably a tree hugger :)
Terra :)
(please forgive me if I spelt these place names wrong!)