Summer is here! Swap the office airconditioning for a natural and healthy way to stay cool, with our selection of 5 lakes that promise to keep heatstroke at bay. The natural lake of Saint-Point, the high-perched lake of Les Rousses, the family-friendly Clairvaux Lake, the turquoise waters of Chalan Lake, the immensity of Vouglans Lake... Forget extreme heat, salty water and crowded beaches, and opt instead for lazing in the countryside in the lovely cool Jura Mountains.