Tidbinbilla Aboriginal rock art
I didn't know about this location of Aboriginal rock art at Tidbinbilla. In the early 70's a PhD from the Australian National University discovered a painting of a single kangaroo estimated to have first been painted over 300 years ago. It certainly today isn't a site open to the public and is apparently located in an inaccessible area of Tidbinbilla. No images I can find of this.
The Canberra Times - Wednesday 1 November 1972