Warmer temperatures are believed to have helped create the lake by melting surface snow, but a cold snap may have frozen its natural drainage routes.

据信，天气变暖造成了表面冰层融化，但随后的冷空气冻结了冰水自然流淌的路线。

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Stop at Ristorante La Froda in Foroglio for lunch (do not miss the polenta), snap a few pictures and soak in the alpine landscape before heading back to the lake.

BBC: Two days in the Italian Lakes