The Marais Poitevin is a large area of marshland in western France, a remnant of the former Gulf of Poitou, consisting for two thirds of a western zone near the sea called the "dry marsh", used for farming and breeding, and for one third of an eastern zone called the "wet marsh", a maze of islets criss-crossed by picturesque canals now used for tourist rowboating and nicknamed la Venise Verte (The Green Venice). It's the largest marsh on the Atlantic coast and the second largest of the whole country.
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