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La vallée du Couesnon

Departmental Sensitive Natural Area in Mézières-sur-Couesnon
  • This valley includes Mézière sur Couesnon, Saint Ouen les Alleux and Saint Marc sur Couesnon. The Couesnon, the main attraction in the valley, is a Category One river. It cuts a swathe of green through Ille-et-Vilaine thanks to its wooded hillsides and verdant hedgerows.
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