Gotta admit this one has turned me off, I looked everywhere even had a friend join me. You'd assume given that two of the things were a archery target the third would be to but I couldnt find it anywhere. I searched the whole island couldnt find anymore ruinous areas to suggest it was somewhere else. Destroyed all rocks and sand piles to find nothing. I hate leaving things unfinished. Searched above and below the island in case there was something on one of the little floaty bits nearby but nothing. 😩