As the public television series on National Parks continues, WPSU takes a look at another kind of public resource in our commonwealth: the system of State Heritage Parks. More than 30 states have now adopted the model pioneered in Pennsylvania. WPSU's Lindsey Whissel talks about these regions with Bob Imof, Director of Government Contracts for the North Central Regional Planning Commission. Imhof helped establish the Pennsylvania Lumber Heritage Region, the second largest Heritage Park in the US.