Best geological formations in Pennsylvania

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Pennsylvania geological features

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    Devils Den , Gettysburg
    Devils Den is a boulder-strewn hill on the south end of Houck's Ridge at Gettysburg Battlefield, once used by artillery and infantry (e.g., s
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    Indian Echo Caverns , Hummelstown
    Once the home of a well-known hermit, Indian Echo Caverns is an underground collection of limestone formations. The caverns have easily acces
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    Laurel Caverns , Farmington
    Laurel Caverns, is the largest cave in Pennsylvania by volume and area. Split into two sections, its entrance into the upper cavern is a netw
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    Crystal Cave , Kutztown
    Crystal Cave is a cave near Kutztown in Berks County, Pennsylvania, United States, the heart of Pennsylvania Dutch Country. It was discovered
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