The source of the Bouil is hidden under the trees and its width does not reflect the legend which suggests that a cart and oxen were submerged there. On the small road towards Chauvignac, another important source on which a pumping station is installed once supplied a grain mill, and was built by the Romans. The smallest pumping supplies Chenac, the other supplies 13 coastal communities. The source has a maximum flow rate of 1500 m³/h. The overflow goes to the sea via the Chauvignac channel.
Circuit carried out by the Departmental Hiking Committee of Charente-Maritime.