They exist all over Australia too. Some of them are thought to be amongst the oldest examples of human construction on Earth. https://en.wikipedia.org/wiki/Bre

They exist all over Australia too. Some of them are thought to be amongst the oldest examples of human construction on Earth. https://en.wikipedia.org/wiki/Brewarrina_Aboriginal_Fish_Traps https://en.wikipedia.org/wiki/Brewarrina_Aboriginal_Fish_Tra...