Quarantine Zone: Get to top of level

[SmokiestGrunl]

Get to the area where you see the three Wraiths fighting the large Sentinels. Then, get to the place where you are in front of a cave with pillars in it and several small Sentinels attack you. Destroy the Sentinels. Then, make sure you have a Ghost. To the right of the cave entrance is a rock face that you can easily scale by using boost. After you scale the face, you will be on the mountains at the top of the level. The top of the level is very big, and there are many places where you can walk in mid-air.