In the area near the Vex gate, there are a number of floating platforms off in the distance. They cast pretty obvious shadows on the wall leading to the gate. Seems like more than just decorations for that area, I'm wondering if it's another jumping puzzle? Also, off in that direction along the far wall, it looks like there are ledges you can run across. Beyond that, in a corner of the map there is an obviously red area. I don't know if that's simply where you come from, leading into the area, or if somehow that jumping puzzle leads to a final, hidden area. Sharing for more discovery and investigation!