User talk:RightCowLeftCoast/Sandbox/Goat Canyon

Potential references to be used

 * https://authors.library.caltech.edu/25058/2/swhikes/carizo.htm
 * http://www.borregospringschamber.com/abdsp/news/worlds_largest_trestle.htm
 * http://www.abdnha.org/04rockart_main.htm