Located at the foot of the Larzac Causse, in the south-west of Nant, the Durzon Spring is a karstic resurgence whose supplying basin extends over 100km² between L'Hospitalet du Larzac, Le Caylar, Cazejourdes and Egalières. The Karstic system doesn't retains water on surface and constitutes big undergroung water reserves. The flow of the source varies between 0,8m3/s and 35m3/s and has an average temperature of 11,13°C. The Durzon river runs for 6km and flows into the Dourbie river at the place "La Mouline".