Observation Point Marking
The flags are helpful but somewhat distracting. Plus many OP end up in the middle of paths or other mown places and the flag becomes an issue becuase the OP has to be the same next year. I created permanent markers similar to the way survey markers are put in. An iron rod pounded in to the ground with the top below the surface and the a cement collar and cover put over it that is level with the ground.
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