Credit: By Snottywong (Own work) [CC-BY-3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
The rugged Allegheny mountain range forms a natural barrier between the eastern and western parts of Pennsylvania.
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A view of Pine Creek Gorge (a.k.a. Pennsylvania Grand Canyon) in autumn.
Credit: By Snottywong (Own work) [CC-BY-3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
The rugged Allegheny mountain range forms a natural barrier between the eastern and western parts of Pennsylvania.
