Looking for adventure? Download the free mobile application "Treasures of Upper Brittany" available on IOS and Androïd. It opens the doors to a gigantic treasure hunt throughout the Ille-et-Vilaine department. More than 100 routes to discover and many gifts to win while discovering magnificent sites in the department.
Here, this quest will allow you to discover the Lac de Trémelin and its legendary Excalibur sword!