Ceresole Reale ice-free lake acting as a perfect mirror during sunny winter day.
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Ceresole Reale ice-free lake acting as a perfect mirror during sunny winter day.

by Claudio Cassardo, Dept. of Physics - University of Torino, Torino, Italy

Exceptionally flat surface of an alpine lake in Crersole Reale during wintertime conditions make the lake acting as a perfect mirror of mountain shape. Mountains in the central part of the photo separate Piemonte region from France and are part of Gran Paradiso national park. Lake is located at about 1600 m a.s.l.