The cache is not at the posted coordinates so please don’t go there.
To find where the cache is, you need to complete the “Wairau Valley Township” Adventure Lab.
As its name suggests the adventure lab visits places of interest around Wairau Township.
To complete the Adventure Lab you will need an Apple or Android smartphone with Groundspeak's Adventure Labs application installed. You can find this in your device's application store.
Open the app, log in using your geocaching name and password. When the app has opened, click on Directory, (the heart) to find the Adventures. They are listed by the distance they are from you. Click on the one you want to complete, in this case, ‘Wairau Valley Township.’
You will then see the five locations you need to visit. When you have correctly answered the question at each location, check the journal for information to be used to find this mystery cache. You can also check all the journals when you have finished.
You can complete the stages of the Adventure Lab in any order but it is recommended that you start at Welcome to the Braided River Town so you don’t need to retrace your steps to find the bonus.
You will find the final at S41 33.ABC E173 31.DEF