What at first seemed like a series of mail boxes or secure lockers at the entrance to the car park turned out to be an annex of the nearby grocer's (800 mtrs according to the sign) who'd obviously become frustrated at missing the huge 'passing trade' that is the visitors to the ever popular Chateau and Gardens
So he has brought his fruit and veg. to them!
On offer is a selection of different 'combos' of vegetables or fruit and even Fresh eggs (well I'm sure they will be when put in) - very enterprising.
Somehow don't think it would work in UK where it would be seen as a food source and cash dispenser!