THE TOMB (present) :

Go left to a pillar and pull a huge white rock. Go down and open the chest. Now
use the stairs. Do a wall run, jump to a pole and jump again. You arrive to a
fork. Go right and jump to a pole and then to the other side of the bridge.
Pull the second white rock. Go down and go all the way back to the fork. Go
left this time and pass under the rocks. The way will be long to the third
white rock. You will have to do wall runs to a rope and rebound 2 times on the
walls to reach it. The timing is very small. You will watch a scene showing new
ledge on the central pillar. Jump to them and go up. Once on the top, jump to a
lever and pass the door. You can open a chest and save here.