Rocks in the Verzasca River near the hamlet of Lavertezzo in the Valle Verzasca of Switzerland (© Robert Seitz/Offset by Shutterstock)(Bing United States)

Rocks in the Verzasca River near the hamlet of Lavertezzo in the Valle Verzasca of Switzerland (© Robert Seitz/Offset by Shutterstock)(Bing United States)

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