The cache is not at the published coordinates.
This is a bonus physical cache for those who finish the Adventure Lab :
Upon completion of the Adventure Lab, you'll receive the final coordinates for this cache.
Do be mindful of muggles as they are often walking near GZ.
Did you know that NSW has a geocaching association? Geocaching NSW aims to enhance and improve the activity of geocaching and holds regular events where geocachers meet to enjoy their common interests. Visit the association website here.