La Grande Cosse is a naturist campsite and mobile home site in the commune of Fleury d'Aude in the Aude département on the Languedoc-Rousillon region of France. It became a part of the France4Naturisme group at the end of 2009.
It is situated on the Etang de Pisse-vaches, a flat, salt marsh area of outstanding beauty, with a view north to the mountains of central France and a view south along the beach to the Pyrennees. The site has a café, a restaurant, a shop for food and necessaries for the beach and staying on site for a prolonged holiday without needing to leave the site. There are activities organised in high season, and the site has 3 swimming pools, an archery range, pétanque courts, take away and there is a beach bar "Tarifa Playa" where a warm welcome is always assured.
