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| Cuyahoga Valley National Park, OH, |
| Photographer: NPS photo |
| Description: Sand and gravel pits make up a significant portion of the abandoned mineral lands in the national park system, Cuyahoga ValleyNational Recreation Area, OH |
|
| Cuyahoga Valley National Park, OH, |
| Photographer: NPS photo |
| Description: Sand and gravel pits make up a significant portion of the abandoned mineral lands in the national park system, Cuyahoga ValleyNational Recreation Area, OH |