This is a neat little mill, and a nice park, but the major highlight is the continuous tour of the mill's grounds, history, and processes. This is an active mill that produces flour and corn meal on weekdays, and the miller gives tours on weekends. He very clearly knows his stuff, from the history of the mill and the surrounding area to the way the mill works and is maintained. The difference between wandering through a restored mill with signs and descriptions and being led through the mill as its working is night and day. If you have any interest in technology, history, or really just a well-done presentation you should check out the tour. (I think they only run on weekends.)
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