At the given coordinates is large information sign about the Patawalonga Creek and its environmental impact and history.
This area is also known as Pathawilyangga (Swamp Gum Foliage Place).
"The first European description of the area is by Colonel William Light, from when he went ashore on 3-4 October 1836 during his search for a site to found the colony.
"I cannot express my delight at seeing no bounds to a flat of fine rich looking country with an abundance of fresh-water lagoons, which, if dry in summer, convinced me that one need not dig a deep well to give a sufficient supply. The little river too was deep; and it struck me that much might hereafter be made of this little stream. After walking some distance through long grass and frequently through water, we returned to the beach at two a.m., on my part rather fatigued""
(source: https://www.charlessturt.sa.gov.au/community/arts,-culture-and-history/kaurna-culture/pathawilyangga)
Take a read of the sign and find the following information to find the cache location:
Underneath a photo on the sign is a 5 digit number. This is ABCDE.
The cache is hidden at:
S34 (A+B)(E-B).(C-D)D(D+A) Checksum = 24
E138 B(C-E).(C-B+D)(B-D)(B+D) Checksum = 17
Some of the plants and trees in this area are heritage listed so please be wary!
The area is open everyday from 8AM to 5:30PM and no dogs are allowed in the grounds.
Happy hunting!