Franklin Creek State Natural Area is located in Lee County, northwest of the village of Franklin Grove and east of Dixon just north of IL Rt. 38. Beautiful Franklin Creek flows throughout the 882-acre park. Several large natural springs, hardwood forests, bedrock outcroppings and a large variety of flora and fauna comprise a pristine ecosystem.
The mill spring, the largest in the park, provided water power for the largest grist mill in Lee County, constructed in 1847. The site includes a 198-acre nature preserve which is an outstanding and diverse natural area in a uniquely beautiful setting.