In similar spirit of geographical facts about France, France borders The Netherlands however actually not in Europe (there is Belgium in between) but on the Caribbean island of Saint Martin.
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I was once on a Caribbean island that belonged half to the Netherlands and half to France. Whenever I tell people that I once crossed the french-dutch border they are like "wait what"
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The largest country bordering France is Brazil.
Fully integrated in the French Republic since 1946, French Guiana is a part of the European Union, and its official currency is the euro.