This page details how to complete the Fairy Glen standing stones mystery on the Isle of Skye, part of the A Fated Encounter crossover DLC.
How to Complete the Fairy Glen Standing Stones
This is the same kind of puzzle that you’ve encountered with other standing stones in the game, so you’ll need to use Odin’s Sight ( or ) to highlight the markings on the stones. To align the symbols on the stones, you’ll need to go to the southwestern side of the monument and destroy some boxes which surround a movable barricade. You can then move the barricade to the southeast (as far as it will go), stand on top of it, and move the camera around until the symbol aligns, as shown in the screenshot below.