The Callicoma Walk is a walking track through remnant temperate rain forest bushland in Sydney's North Western Suburbs, featuring many types of trees, including Callicoma, Coachwood and Blackbutt, several spectacular rock formations, and is home to a diversity of fauna, including rock wallabies, echidna, bearded dragons and several different dragonflies that we have seen around the creeks.
You can find out more about the Callicoma Walk at this website:
http://www.hornsby.nsw.gov.au/media/documents/recreation-and-facilities/bushwalking/Callicoma-Walk.pdf
The Coordinates will lead you to a quiet spot, where there is a bench on which you can relax and enjoy the view of the rocks on the other side of the creek. When the sun is shining, it is a beautiful place, but there is always trash there that has washed down the creek from Boundary Road and New Line Road.
As you enjoy the view you will see that a tree in view has been carved with names and initials by people expressing their affection for one another. These carvings will guide you to the cache.
Using A = 1; B = 2: C = 3 etc:
SOUTHERLY COORDINATES
Find the last letter in the top name on the tree. Add that figure to the decimals of the SOUTHERLY co-ordinates.
EASTERLY COORDINATES
Find the sum of the letters in the 5 letter name clearly carved in the trunk. Multiply that figure by 3, and then add the value of G. Add your total to the decimals of the EASTERLY coordinates.
This will lead you to your final destination. You are looking for a 1 litre sistema box, painted camouflage colours.
Enjoy!