At Baiame's Ngunnhu - in what would be later known as Brewarrina in north-west New South Wales - Aboriginal people are using and developing complex fish traps that are nearly half-a-kilometre long.
They consist of dry-stone walls and holding ponds within the Barwon-Darling River.
People here have been shown how to set rocks in certain patterns to catch fish through knowledge given by their creator.
The traps change and develop over thousands of years to adapt to the changing river and flow.
The Barwon-Darling river is used by many families.
These groups cooperate and maintain a sustainable food and land management system, looking after their individual ponds along the river.
In this region eight tribes trade, share food, tools and resources.
They hold big social events and ceremonies together, arrange marriages and settle disputes.
This successful, cohesive relationship is because of their kinship system — a productive, well established, and deeply-rooted social structure.
It’s so successful that it has lasted for thousands of years, without even being written down.