Shortcut way:
1. Go to Breached Wall Waypoint [&BGEBAAA=] and walk East/North, climb up the rocks like shown below.
2. Now jump on the boulder and after on the ledge, now you can jump on the platform above, after that you will see the chest jump down get the chest and your done.
Normal way:
1: Go to Breached Wall Waypoint [&BGEBAAA=] and walk East/North, climb up the rocks like shown below.
2: As soon as you get up, walk east, around the big boulder and continue to the edge. To the left of you now, there is a small passage, between another big boulder and a wall, go through and climb the path up to a new platform, here you will see a big wall in front of you, with leaves covering a hole, jump through it.
3: Walk through the tunnel and turn left. Walk a bit North and when you reach the stairs turn East/South.
4: Continue left of the wall, and jump over to the platform with a big tree on it.
5: After the jump, look East there are two broken pillars and a staircase. Jump to the pillars and then to the staircase. Walk to the edge of the staircase-platform and jump to the little grassy platform in front of you. After that jump on the platfrom in front of you, after that you will see the chest jump down get the chest and your done.