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In this 4th episode of the Most Complex International borders, I look at the surprising complications in Lake Malawi, then look at parts of Europe that are part of two countries, and finish by looking at the dispute between Costa Rica and Nicaragua.

Links to previous episodes:
Part 1 -    • The Most Complex International Border...  
Part 2 -    • The Most Complex International Border...  
Part 3 -    • The Most Complex International Border...  

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