On the newest episode of Unbound, Casey and Regan are getting in touch with nature by looking at the stories of the unlikely formation of two of Indiana’s State Parks, Spring Mill State Park and Shades State Park. 

George Donaldson Spring Mill's Eccentric Naturalist

Further Information:

Donaldson Cave, Spring Mill State Park, Mitchell, Indiana

Spring Mill State Park Map

Shades of Death State Park

Indian Trail Shades of Death

Elinor and Mary Canoeing at "The Shades" [Shades State Park]