This mystery can be found in the south of Suthsexe, about 560m southwest of Crawleah.
How to Stack the Stones for High Rocks in Suthsexe
As with other cairn mysteries, all you need to do is stack the stones to the required height. You can do it multiple ways, but you can see the screenshot below for one of the simplest and easiest arrangements. For an end game region, this is actually one of the easiest cairn mysteries in the game. Once you’ve stacked the stones to the required height, validate their position to complete the mystery.