Idro is a picturesque lake in the Italian province of Brescia. It has a special charm due to the surrounding mountains — the view is simply fantastic. Keep it in mind, if you decide to go to Italy to just relax in nature, rather than to see cultural attractions.
By the way, Lake Idro and its surroundings are great for such activities as rafting, trekking, and skiing in the winter. In the summer, mountain slopes are actively explored by fans of cycling.