Cedar Bog State Nature Preserve

Cedar Bog State Nature Preserve
Cedar Bog State Nature Preserve, four miles south of Urbana in Champaign County, is a National Natural Landmark.  More than forty endangered, threatened, and rare plants and animals are found in its 450 acres.  This preserve is operated by the non-profit Cedar Bog Association and is owned by the Ohio History Connection.   There is a $5 per person admission fee.  Here is a description from the Ohio Division of Natural Areas and Preserves.
Their phone number is 937-484-3744.
The boardwalk, 1.2 miles, has been built to ADA specifications and is fully wheelchair accessible.  Thank you Mike Crackel for letting me know about it.