Robert Kosara has created a map linking all of the most of the Australian postcodes [^] together in what he calls a “scribble map”. It’s something that I have always wondered about but never bothered to research. This infographic makes it obvious were the dense clumps of people are with the close zig-zags all down the south-eastern corner of the country.
There are plenty more maps on the website – including Germany, France and the US – so go check them out.