Porter County
I was born here, but didn't stay long. Very urban, but some nice places to visit anyway. The shoreline in front of Beverly Shores (a wealthy neighborhood) has some preserves owned by the Shirley Heinze Land Trust, but I think you have to be a member to see them. There's a Wizard of Oz festival every year in Chesterton, no one knows why.
Little Calumet-Langeluttig Marsh