Rise of the Tomb Raider ANCIENT CISTERN Challenge Walkthrough
How to complete the ‘Ancient Cistern’ Optional Tomb Challenge
Also will earn you the achievement ‘Challenging’ if this is your first tomb that you complete.
While going through the campaign you will come across an area near the logging base camp and notice the tomb appear on your map. Only enter the cave for the document, otherwise head over to the crane and shoot down the log like I do in the video. The cave is a dead end and leads no where. Cistern Caven Base Camp will fast travel you to this location.