Assassin's Creed Valhalla

This title update adds two tombs in addition to the three from the first title update. As with the previous tombs, there's no way to have them marked on your map. To help, I've taken a bunch of screenshots of the locations to help you get to them quickly and easily. Since I only included two tombs in the previous guide, the remaining three entrances are shown in images below.
   
Each tomb involves a series of puzzles and some platforming, just like with the original tombs. They relatively simple even without a guide, but if you'd like to see how they're completed, refer to THIS GUIDE.
 
IMPORTANT: As I mentioned in the first title update's guide and roadmap, you should have collected the optional tomb fragment hidden at the end of each tomb. If you didn't do so, you'll need to return to the tombs you've already completed and grab it at the end of each one. Thankfully, assuming you broke the bar off the locked door at the end of each tomb, you can take that shortcut back to the end of each one to get the artifact quickly, without having to go through each tomb again. With the new tombs, be sure to grab the tomb fragment at the end of each as well.
 
With all five tomb fragments collected from the five main tombs, return to Manius's Sanctum, located directly south across the river from Ravensthorpe (it should be marked on your map from the first title update). Head through past the pressure plate and down the zip line to start a cutscene to open up the final tomb - Eden Ring Station. Head down and into the tomb for a decently long series of reflected light puzzles. If you need any help with this tomb, refer to the above guide. Once you finally get to the center and remove the item there, after a brief cutscene this achievement will finally unlock.