Teleport to the jungle campsite using your Docs. Case. Go to the right and climb up the vines.
In this area, proceed around in a sort of C shape to the top-RIGHT exit. From there you'll be at the foot of a waterfall. You wanna work your way around, cross the river and climb up the waterfall using the vines and such.
Once you reach the top of the falls... there's only one path to go, to the left. You should be able to figure it out from there.