In Assassin's Creed Valhalla you can find maps leading to treasures. Sometimes they take the form of a puzzle, other times they are a drawing of the area where you will find the treasure. This page of our guide describes where you can find the treasure map in the Rygjafylke region.
1st stage - map
You will find the treasure map in the southern part of the map, in Venonis.
To get to the map you have to run under the bridge and then reach a closed corridor where several vases and boxes stands. Simply destroy them with your weapons to open up the passageway.
The map is located on the sarcophagus in the northern part of the room. In this location there should be no danger, so you can freely explore the area.
2nd stage - treasure
You will find the treasure in the southern part of the region, east of the river.
The schematic is hidden among the rocks that lie on the slope of the mountain. All you have to do is run up to them and you should see a glowing spot.
Be careful because the treasure maps are terribly buggy. If you reach the right location and you don't see a treasure in it, try to turn the game off and on. The treasure may reset itself.
Also, remember to take a look at the map every time you get one.