Key things to see or do while visiting the site:
Be sure to see the exhibits and live education animals in the Nature Center. Also, walk on the self-guided interpretive nature trail. Have questions? Get them answered by one of the naturalists.
While in the area, go to the five museums in Lancaster. You will find plenty of places to eat or just sit and have a beer. http://www.visitfairfieldcountyoh.org/
And here is the historical parks guide, complete with local area covered bridges and the Rock Mill. http://historicalparks.org/map.pdf