Woodthrush Woods State Preserve is a 25-acre forest with a mixture of upland and bottomland forest, located seven miles east of Fairfield in Jefferson County.
Hartley Fort State Preserve features the remains of a prehistoric fortified village. This 2-acre, privately owned preserve is located along the Upper Iowa River
Turkey River Mounds State Preserve is a 62-acre area containing a large complex of ancient Indian mounds overlooking the Turkey River and Mississippi River.