9Argentina and Brazil – The Iguazu Falls Border

Few borders in the world are as spectacular as the one shared by Argentina and Brazil at Iguazu Falls. This colossal system of waterfalls—275 in total—forms a breathtaking natural boundary between the two countries.

Visitors can see the falls from both sides, with Argentina offering closer trails and Brazil providing sweeping panoramic views. The sheer power of nature here makes this border one of the most jaw-dropping on Earth.

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