The double doors leading to the Canal du Midi are especially interesting. As the notion of `up-river' changes depending of the water level of the Herault. For that reason you see doors opening towards the inside, if the Herault water level is higher than the level of the Canal du Midi, and doors opening towards the outside, if the water level of the Canal du Midi is higher than that of the Herault.
With all the pleasure boats this can be quite an interesting sight! It is like boarding an airplane - everybody wants to be first in, and first out!
