Hi luv: I originally posted a bit about one the south side of a deep canyon in the mal pais zone. When my friend who was surveying for a possible new road, had finished taking his necessary bearings , he swung his theodolite to the south looking out of curiosity, just using it as a simple telescope. He saw a low breast works of stone on the southern edge. He marked it down in his notes then forgot about it.
Much later he heard of a group of miners that had hit it big in the Calif. gold rush were returning to the East when they were attacked by Indians.. They had formed a group for protection against outlaws and still wild Indians. During the fight, they constructed some low breastworks. Unfortunately all were killed.
Supposedly none of their gold was moved since the Indians had no use for it, just personal equipment and guns.
He returned later on the new highway to look for it, but even with his notes he could never find it again. The lighting had been perfect when he first saw it.
He always told me that it had been built in a "U" shape with the open end over looking the canyon.
Don Jose de La Mancha