This achievement will unlock by normal story progression and is unmissable
Pretty early in the game, you get the "quest" to find this particular tree. It will be shown to you on your minimap (of course your minimap should be pretty much black at this stage in the game but anyways...). It is all the way up north and you have to survive a tricky jumping part that needs you to wall jump and dodge some projectiles shot at you.
As soon as you reach the tree and the narrator starts telling you a story, you should unlock the achievement. Personally, I had some troubles unlocking the achievement. It didn't unlock right away. I had to hard-boot my Xbone and restart the game. As soon as I loaded my last save, it unlocked.
For more tips and references please refer to the video below!
(video credit: Plagueis Xboxlivefr)
Hope this helps you guys!
Any improvements? Please let me know in the comments below!