Two pieces of stove pipe spliced together with bailing wire and an evaporated milk can.
California barrel cactus.
At some point in recent history, folks began using opened, PVC pipe to mark mining boundaries. Unfortunately, birds get into the pipes then can not get out. When one is upright, it’s standard practice to lay the pipes down in the rocks that were standing the pipe up. Very rarely do we lay down a pipe without the remains of a bird.
When we came back down the hill, we found pieces of an old stove. Also very common in old mining camps.