Private property. No public access without permission. As these are older photos, I did the best I could re the leaf (last photo). Most of these orchids come up each year but only flower on hotter days and stay open for a very short period or in drier years don't flower at all. This orchid was growing up through a wallaby grass tussock. I will post some other sun orchid photos from the same area. I am not sure if they are the same or different species.
I've suggested T. nuda but again not sure. The last image shows what appears to be a very broad leaf, and the flower is quite open with dark brown towards the top of the column and toothlike brushes on the column arms, all which woulf fit with T. nuda. Over to you Cath and Tobias.