Indiana has so many wonderful state parks, it is difficult to choose a favorite. But if I had to choose, I would pick Potato Creek.
With miles of biking and hiking trails, a lake with some pretty good fishing at times, and a babbling creek to listen to; this park offers more than you can do in just a day.
Potato Creek's wildlife and fauna is abundant; swans, herons, beaver, deer can be spotted, although in November when the park goes through annual goose and deer reduction hunts, it can get difficult to scare up even a bird.
The leaves are off the trees now and you just might catch a view of a bluebird on one of the trails. If not, the quiet beauty of the park in winter will have you winding through the bicycle trail all winter long.