Check out my books about ancient Peru here: https://www.amazon.com/s?k=brien+foerster+peru&crid=28IGUDAJG343N&sprefix=brien+%2Caps%2C693&ref=nb_sb_ss_ts-a-p_2_6
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https://www.youtube.com/watch?v=eC_YmCYQSv4
One of the strangest border crossing is between Brazil and Paraguay. No passport is required as this is not the actual border, but entrance into a chaotic duty free zone.
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https://www.youtube.com/watch?v=CrbuHukee6Y
Learn more about ancient Peruvian mysteries via my books: https://www.amazon.com/s?k=brien+foerster+peru&ref=nb_sb_noss
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https://www.youtube.com/watch?v=Mq6rQuhXboM