Datacrons boost your primary stats permanently.
Loc: -162, -336
It’s halfway up the big rock holding up the centre of the bridge in Glarus Valley.
Click below to see full guide.
Circle around the huge rock pillar till you see that yellow glow of the datacron. Turn right.
Cross the river and follow the bank.
And you find a clickable sky-fish looking thing. Click it for a ride.
It will circle the mountain.
Drops you off right in front of it. Hop to it and you win.