It is said reach north of the Loire! Small canal long 350m. starting at the water intake of the waterfall and supplying water to the two cascades in front of the house. Parallel to the river, its vocation was to control - by means of a complex engineering system - the volume and flow of water that was intended to be converted into hydraulic energy. For botany lovers: many rare species of ferns, mosses and lichen adorn its walls.