This nature reserve includes some of the old ‘Riga’ lakes. It is not accessible to the public as it is dangerous due to a family of beavers deciding to set up home there. The beavers’ presence has significantly altered the original ecosystems. The meadow that can be seen from Rue du Pont des Brebis has turned into a marsh. It is possible to visit the site accompanied by a local forestry officer or authorised nature guide.