HL2/CS meets FarCry?
The waterfall and the swamp look great, and the tree models are quite fitting. However, the rock cliffs could use some more work. They need to look more three-dimensional. Right now, they appear flat and feel like props on a movie stage.
What about some mist in the jungle? Do you already have some sound effect for jungle noises (birds and monkeys and stuff)? Also, I assume you plan to add sound effect to the waterfall too, if you haven't done so already.
Good looking map so far.