Valley of the Mills, Italy

Loved this cute unexpected valley of the mills in Sorrento Italy. First of all you're walking on a beautiful little town and all of the sudden there's a drop on your left (if you're heading towards the main plaza, you could say) and you see this hidden treasure all the way at the bottom of the rocky mountains around it. From what I've read, because I just found it to fascinating to let it go 3 years ago...it was a water mill, not a grain mill.