HI All,
I spoke about this with our local Lands Council when I came across a spear grinding site with a group.
NOTE: Each Koori Nation had different mores and cultural beliefs. It would be best to speak to your lands council when unsure.
Here is a potted summary of the discussion I had, but this may not be relevant to your situation.
Caves are sacred places - some were sacred and only used for birthing, others had differing uses. Stay out of caves.
DO NOT TOUCH CARVINGS - do not make a pencil rubbing. Photos for the Dharug nation were OK.
Do not tread on carvings - same deal. photos OK, but no contact.
There's a large midden in the middle of the North Era campground in the Royal National Park, Sydney that's fenced off to prevent contact. It'd make sense to me, in line with the above, to avoid walking over middens out of cultural respect. A google search shows photos - the Midden's probably 40 metres x 40 metres. Search on "North Era" in google images to get a looksee at what one looks like.
http://farm1.static.flickr.com/163/4361 ... 6b.jpg?v=0 is one photo that gives an idea of the scale of this midden
http://farm1.static.flickr.com/170/4361 ... ed.jpg?v=0http://www.flickr.com/photos/ian_riley/4464695806/The key point, however, is that each aboriginal nation was just that, a separate nation, with separate culture, customs and beliefs. It'd be worth speaking to the local parks officer or lands council for correct behaviour appropriate to the local customs in my opinion.
Just my opinion, others may vary.
Cheers,
eddie