At first glance, this structure at Confluent near Yzeures-sur-Creuse appears to be an over ambitious piece of decorative metalwork.
For some reason, the word "windmill" seems far too pedestrian: the French is "éolienne".There is a similar éolienne which is a bit of a tourist attraction at Dolus-le-Sec. Compare this to the much more utilitarian Australian version, manufactured in the Queensland town of Toowoomba. These windmills are not for milling - they are wind powered water pumps, used in Australia for lifting water from the artesian basin. I assume they are used for similar purposes in France, as Dolus-le-Sec translates as "Dolus the dry".
PS :An interestesting coicidence is that the pictured windmill stands in the same farmyard as one of yesterday's cedars