The old Spanish ' fierro ' or ' jierro ' = HierroPosiblemente it was this reference to metal or its sonority to the echo of those narrow places multiplacaba, that gave rise to the toponym in old Castilian, ' fierro ' or ' jierro ' whereby, since then became known as the most high and width of the canadoren. 19andThe Canyon of the 39 jierro road;
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