This may be the most photographed mill in America. The Mabry Mill is located in Floyd County, Virginia, at mile 176 of the Blue Ridge Parkway. Pioneer displays plus a gift shop and restaurant nearby assure lots of people stopping in. When we stopped in early October, the crowds were so large we could hardly move, and getting pictures of the mill without people in them required more patience than I normally have.
Most sources give 1910 as the year the mill was built. It has an overshot wheel that is fed by a long millrace. When we were there, Virginia Creeper was showing its color as it climbed to the peak of the end gable, and the large maple nearby was in peak color. It's really a fine mill. My best advice is to try to visit mid-week.