https://www.outdoorproject.com/blog-news/national-treasures-utahs-native-rock-art http://blog.redrocksandbeyond.com/2016/10/shamans-gallery-ghosts-in-desert.html and then there's the heroic compilation of images gathered by ian parker, a british scientist working in california ... http://parkerlab.bio.uci.edu/nonscientific_adventures/Petroglyphs.htm beside the dried up bed of a lake, lake winnemucca in nevada ... thought to be the oldest north american petroglyphs ... photo by steve chandler https://www.youtube.com/watch?v=lsXwSe4oEOA https://en.wikipedia.org/wiki/Winnemucca_Lake https://www.npr.org/2013/08/16/212569006/n-americas-oldest-known-petroglyphs-discovered-in-nevada https://www.donsmaps.com/winnemucca.html https://en.wikipedia.org/wiki/Category:Rock_art_in_North_America