The Allegheny National Forest, known as the PA Wilds, sits about midway between Philly and Pittsburg in the northern regions of Pennsylvania. Beguiling landscape aside, these eight breakthroughs, inventions and attractions might surprise you.
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Christy, in the center, checks me in upon my arrival. "You're all set, Mr. Zuckerman," she says when we're through. "Thank you Christy," I say, seeing...
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