The ecological interest of the Etang de l'Arnel, which forms part of the greater Languedoc lagoon complex, is recognised by various classifications, the benefits of which relate specifically to protection and management as a Natura 2000 listed site. It has also been classified, in part, as maritime hunting reserve since 1973. The Etang de l'Arnel is the perfect place for bird watching including, specifically, pink flamingos. You can walk or cycle round it (approx. 13 km), passing close to Maguelone Cathedral.