Sometimes referred to as Bora Rings, they have been formed by scraping off grass and topsoil, and piling it in a circular ridge around the outside. They measure between 10 and 25m diameter. All of the rings in Sunbury are on gently sloping sites. They are somewhat different to the Bora rings found in New South Wales and south east Queensland, which tend to be located in hidden, flat sites, and in connected pairs. The Sunbury rings first came to public attention, and first were investigated and described in the early 1970s, when archaeologist Dr David Frankel undertook a test excavation on one of the rings to determine their origin. Excavations revealed the remains of two small stone cairns, one in the centre and one on the edge of the circle, and a number of sharp stone plades or knives, which were possibly used in ritual scarification or circumcision ceremonies.
The rings have been interpreted as Aboriginal ceremonial sites, although there are no historical or ethnographic accounts of them being used as such. Members of the Wurundjeri Tribe Council have suggested the rings may be more than 1000 years old, based on the results of archaeological investigations. However, Elder Auntie Annette Xibberas acknowledged that the aboriginal people of Melbourne ...lost a lot of our knowledge with European colonisation, we only found out about these (rings) about 30 years ago.
The ring is located in the paddock near the cache and can be viewed from GZ. It can be hard to pick out at certain times of the year due to the colour of the grass but it is generally identifiable by the lack of grass in it's centre.
This cache was originally across the road however it was muggled within a few weeks of being placed, despite being well camoflagued! After some feedback from the cachers who attempted to find it I have moved the cache across the road. There is parking available off Old Riddell Road near the cache, however it is a dangerous spot to cross the road due to the lack of visibility and it being three lanes wide. I recommend parking at the top of the hill (on the same side of the road as the cache) near Team Ladava's 'Sunbury Panorama' and walking along the roadside reserve to GZ.
This is an experimental cache and the mixture didn't work as well as I'd planned so the cache is quite fragile, please be careful not to break the camouflage. Make sure you blend the cache back into the natural environment before leaving.
Enjoy!