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In previous posts, we’ve looked at the irregularities in the US-Canada international border, and celebrated the five most interesting exclaves in the world. The strangest border of them all, in my opinion, was the one running through the village of Baarle Nassau/Baarle Hertog, which sits between Belgium and the Netherlands and includes 22 Belgian enclaves and 8 Dutch enclaves (pieces of one country inside another).

Border between Belgium and the Netherlands at Baarle Nassau & Baarle Hertog (via wikipedia)

But there are many more complex borders between countries to explore, including the unclaimed land between Egypt and Sudan, and the bewildering system of dozens of enclaves and exclaves between India and Bangladesh. Trying to make sense of it all is enough to give a cartographer a headache, but these enclaves also cause a number of problems with regard to security and access to international aid.

The video below, created by YouTube channel WonderWhy, does a remarkable job of explaining the most complex international borders, including the historical reasons behind these cartographic curiosities.  You may still be rather confused by the end, but you might learn a couple interesting tidbits to bring up at cocktail parties.  Enjoy!