This cache is not at the posted coordinates!
The posted coordinates are near the location of the Adventure Lab series, Burley Griffin Willoughby Wander.
After completing the Adventure Lab series, a keyword for the certitude checker will be supplied and may be found in the journal.
The keyword is essential in solving this mystery cache.
You can validate your puzzle solution with certitude.
After solving the puzzle provided in the certitude checker, the standard cache checker may be used to confirm the cache's GZ.
The cache may be found at S 33 48.ABC E 151 13.DEF
There is no need to take more than one step off the path to retrieve. You don't need to disturb any of the walls built either.