This chimney looks something like a chair. The trees on either side make it look like a real throne. As with all the Stone Ruination caches, if you have any information about the area, please feel free to share it.
4X4 recommended, but a decent high clearance vehicle should get you to within a few feet.

Photo courtesy of Snake & Rooster, January 2006
I do not recommend coming at this directly from SR#1. It may be possible, but there is a much easier way.
Not recommended as a Night Hunt as it may attract unwanted attention from the Border Patrol.