The Marais d'Orx Nature Reserve is a former polder where 247 species of migratory or wintering birds make their temporary home, on the lakes, amid the willows and bulrushes. Directly immersed in the marsh, following the return path and making the most of the observatories laid out along it, you will be able to see spoonbills, osprey and greylag geese. You will also learn a great deal about the ritual of migrations and the history of the people and territory. A fascinating site!