A bit of a puzzle to think about which can then be picked up either on the way to Karekare, or on the way up to The Mercer Bay carpark. Round trip is about 7km and will take about 3-4 hours depending on how much sight seeing you do along the way.
To solve this one, you'll need to plot some circles to figure out where this one is hidden.
These three caches are nearby:
Bridgeburner
Selfie Point III Selfie Harder
The Ace of Spades
The distances from these caches to this cache is in no particular order are:
305 m
459 m
569 m
This cache can be found at the intersection of where the distances from these caches meet. All you need to do is figure out which distance belongs to which cache and work your magic from there. The cache is placed just off the trail, so no need to investigate any coordinates that place you on a bush bash somewhere. Use the geochecker to confirm and get a hint for the final location.
FTF: Aiden29, Gorbygorbachov, merlot5