Stati Uniti d'America occidentali
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Rick Cooper - CC BY 2.0
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Opal_Pool_YNP2.jpg: Acroterion
derivative work: Gaendalf - CC BY-SA 3.0
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view2az: cropped and adjusted by Beyond My Ken (talk) 17:32, 11 November 2018 (UTC) - CC BY 2.0
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