Could not find the bones? Fear not, this guide will help you.
All 5 Bones Location
Femur
Located behind a bush, near the river with stepping stones in it.
Humerus
On the highest cliff to the right of the lighthouse, behind a bush.
Ribs
On top of the cliff to the right of the mysterious shack.
Skull
On the cliff to the left of the shack.
Spine
On a small beach to the right of the lighthouse. You’re (presumably) meant to parkour over, but you can also drop down from the cliff where the humerus is…
Credit to Elipsis for the locations and images.