Gentlemen, in the 1500's and the 1600" cactus were ocaisionally used as a marker, but as the poplation grew every lill kiddie, plua the 'grown' kiddies, used the cactus as a representative human target,. I have been guilty of this also, I finished off my cactus opponent rather quickly, however in the case of the Tarasca lost mine I followed all of the signs to the last one which included a rock at the base of a cliff that was to be used as a table which had the final view to the west blocked by a Pitaya ( similar to a Saguaro) lopped off at sitting height view from the table. .( I never did see what they wanted me to see, but I found the Tarasca by another method --- below the creston you will see the dump of the mine, never did,)