Mail is delivered in the Grand Canyon of Arizona by Mule Train

Mail is delivered in the Grand Canyon of Arizona by Mule Train
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Regular mail delivery is now provided by horses in limited areas where other forms of transportation are not practical. For example, some towns in mountainous parts of Sichuan and Tibet, in China, are served by horse couriers.[5] The village of Supai, in the bottom of the Grand Canyon of Arizona, United States, is served by a regular mule train from the canyon's rim.[6]@Curionic

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