France
Nothing wakes you up quicker than a dip in the icy glacier waters of Lac Bleu in Morillon, slap bang in the middle of the famous Grand Massif skiing area. The water is shockingly cold, but beautifully clear and refreshing, particularly during the hot summer months when a swim in the lake is much needed. The location is just like a scene from a postcard, with the Alps on one side and a recreational park and pine forest on the other. Even during peak season, the lake never seems to be overcrowded. This makes it ideal for family outings and picnics. My favourite part was plunging into the water from the jetty and scrambling back up, shivering, about ten seconds later.