On the map of DayZDB, I have heard there is a HUGE paiting on it (of a primitive warrior). Has anyone seen it in game or have a picture(s) of it?
Number 4 in this video looks like what you're talking about. A giant Native American Warrior made of dirt paths, only visible from above.
Here's the relevant screenshot from the video:
EDIT: A more cultured user than me pointed out that it's in fact a replication of the Cerne Abbas Giant in England, as seen below.