LaGrange (or Lagrange) County has a bunch of nature preserves, although most of them begin with the word Fawn, and they seem to come mostly in two bunches, geographically. Bring your canoe for some of them (I think in one place you can hit 5 this way). You can also canoe the Pigeon River .
Fawn River Forest
Fawn River Firelane
Fawn River Foraging Farm
but enough of this.............