Artificial lake located in the municipality of Allineuc, in the Côtes-d'Armor, Lake Bosméléac appeared with the construction of the dam of the same name between 1830 and 1842. The latter was intended to supply the canal from Nantes to Brest.
Today, this four-kilometer stretch of water is very popular for its fishing area and water sports. It is divided into two large coves that can be explored on the path that surrounds the pond. Do not miss to admire the waterfall formed by the Oust after the dam.