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:
FORTIFICATION ROCK NEAR HEAD OF BLACK CANYON NARA . Scope and content General notes Local identifier WA Smithsonian Institution NARAAuthor O'Sullivan Timothy Photographer File FORTIFICATIONROCKNEARHEADOFBLACKCANYONNARA tif tif File FORTIFICATIONROCKNEARHEADOFBLACKCANYONNARA NARAcooperation PDUSGov Timothy O'Sullivan