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The original was posted on /r/todayilearned by /u/PillowManExtreme on 2024-09-16 09:56:21+00:00.

Original Title: TIL the longest straight border in Australia, the WA/SA-NT border, isn’t straight at all. It moves 127 metres from the 129° E parallel halfway. 40yrs after two marked obelisks were placed on other sides of the continent, it was realised one was entirely in the wrong place—but kept the border anyway.