There’s a cairn mystery above Kinder Downfall in Snotinghamscire in Assassin’s Creed Valhalla.
Your objective is to stack the stones until they reach the required height.
Here’s a guide for Kinder Downfall’s cairn in AC Valhalla.
To begin the mystery, get to the location shown below, marked by the map marker.
Interact with the stones to begin. They are above the waterfall.
How to stack the stones
When you begin the challenge, you’ll notice that there is already a vertical stone placed nicely.
You can use it as the base. I stacked the biggest stone vertically above the base stone.
This was followed by three horizontal stones, and it was enough to reach the height. Validate the formation to complete the cairn.
The cairn mystery ends here.