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Hickory Run State Park, located in northern Carbon County, on the Pocono Plateau of northeastern Pennsylvania, is home to one of the most striking geological feature in the state. It’s a huge bed of rocks measuring approximately 400 feet by 1,800 feet and at least 12 feet deep, containing a jumbled assortment of loosely packed boulders —most of them medium-sized, less than 4 feet in diameter, although some of them measures up to 25 feet. The boulder field is extremely clean, in the sense that there is no fine material such as sand or clay filling the space between the boulders. And if you listen closely, you can sometimes hear water flowing beneath the rocks.

hickory-run-boulder-field-1

Photo credit: Nicholas A. Tonelli/Flickr

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