-[DESCRIPTION: on the outskirts of the land called Empty East,
statues of stone with holes carved through act as sentry with brightly colored strips of cloth that stand out to be visual markers.]-
The holes focus the air rushing through, producing a shrill sound.
To those who wander where either the whistling can be heard or the flags can be seen, it's to say they are too close.
Passing a horizon length, these statues become more frequent and prominent. Before stopping completely. At that point only wit can help.