Free images results:
 

Mill pictures, stock photos and images

 
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Mill Stock Photography
Author: Radovan
Wings Stock Photo
Author: Knips
Watermill Stock Photos
Author: Pryzmat
Windmil Stock Images
Author: Akivi33
Windmill Stock Images
Author: Ichtor
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Water mill Royalty Free Stock Photo
Author: Tiero
Water mill Stock Photo
Author: Tiero
Water mill Stock Photos
Author: Tiero
Mill Royalty Free Stock Photo
Author: Chillusa