In Assassin's Creed Valhalla Wrath of the Druids, you can come across Cairns that will give you extra points. On this page, you will learn where to find Cairns in Meath.
You will find the cairn in the northern part of the region, near Knockfree.
It is not an easy task. You have to arrange the stones so that they stay upright, this is the only way to reach the designated height. Arrange the stones so that they rest on each other and do not fall. Pay attention to their edges - if their narrower ends are flattened, it will be easier to place them upright. And if they are wider - horizontally.
Stack this cairn by placing the largest stone vertically and the others horizontally. Try to match the bottom edges perfectly, so nothing falls off.
By completing this task, you will receive an extra skill point.
If you run into a situation where you can't even place two stones, simply reset the game. There's a good chance that something is bugged - you won't be able to finish that cairn.