France technically shares its longest land border with Brazil, a geographical anomaly made possible entirely by the existence of French Guiana, an overseas department located on…

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France technically shares its longest land border with Brazil, a geographical anomaly made possible entirely by the existence of French Guiana, an overseas department located on the northern coast of South America; this dense, jungle-covered territory is not a colony but a fully integrated region of the French Republic, meaning it uses the Euro and its citizens vote in French elections, resulting in a border that stretches for 453 miles through the unforgiving Amazon basin, drastically beating out France's European borders with Spain or Belgium, serving as a brilliant piece of geopolitical trivia that completely ruins European geography quizzes and proves that imperialism really did leave a gloriously confusing administrative mess across the entire globe