At one end of the board walk that runs though the mangroves at the back of the Aquatic Centre is a very large totara tree.
This cache was originally hidden behind a little wooden carving, however with that now gone I've opted to replace with a little cache, employing natural camo and placing slightly lower- we are looking for something around shoulder height- that will obviously be higher or lower for some. Be careful as there might be a lot of muggles around and there are houses close by so be stealthy!