I've been on a number of hikes while here in Sedona. On each of them, I came across these piles of stacked rocks...
I had no idea what they were for, but I didn't want to disturb them. They looked intentionally set.
I later found out that they are stacked to ward off evil spirits. And to protect the energy.
I should have set them up in the agency I worked at in NYC. (HA!)