Author 'Chachane92' (Id 231546 ) : Here, we're going to take the round lock of Agde-Vias !
This is the only round lock on the Canal, but also in the world at the time of its construction (1680).
It regulates the servicing of 3-way water ;
In addition to its role as the stairs', she was also a role of the roundabout.
Finally, it has been enlarged to facilitate manoeuvring of the barges.