Big Slackwater Boardwalk — photo spot in 7900 Avis Mill Road, Williamsport, Maryland 21795, United States

Big Slackwater Boardwalk - Image 1
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Big Slackwater Boardwalk

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A unique section of the C&O Canal National Historical Park where a concrete boardwalk is built directly into the limestone cliffs along the Potomac River. It offers a dramatic perspective of the river and rugged rock formations.