Yes, there are actually six of them in this picture. Looks a bit messy, I know, so I am going to balance that with a very clear, down-to-earth shot:
The valley to the east from here is known as the six mill valley because there are six mills (suprise!). They are not in operation anymore and function as small museums, an upscale restaurant or have been transformed into places of residence. There are a lot more mills further along the small river called Weschnitz, to be sure, but these are the ones within the scope of a comfortable Sunday stroll.
The Ragtag Daily Prompt: Six