Make your way through the new location, Cliffside Village, following a very linear path. Stop when you get to the huts situated along the cliff. Jump across to the canvas pictured above. Swing on it to be able to jump over to another ledge.
Now it's time for a longer running sequence. You can't stop at any point because the huts will keep collapsing into the precipice. Keep jumping and grab onto cloths when needed. As soon as you land on a safe platform, a new cut-scene will be triggered (reward: 100 XP).
Up against you - another riot shield-wielder. Do the same as with the last one, in the base: dodge and wait until he opens up to fill him with bullets. Afterwards, search the bodies to replenish your supplies (reward: 25 XP).
You're free to move on and find another base camp (Cliffside Vista). You can't fast travel here, but you'll unlock the fourth of Lara's Journals.