This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Cascadia Cave Markings Oregon. en Cascadia Cave in Oregon is listed on the National Register of Historic Places by the US Department of the Interior This photo shows the clearest cave markings on Cascadia Cave done by Native Americans who lived in this area own percent National Register of Historic Places in Linn County Oregon