Dude, what a potential you've got!
The placement is very good, the fog use is very pro too, the way the things fade away, the tile variation... yay.
+ rep.
Now, time for the critcism:
1. The water in the foreground is wierd. You can't actually see the water, and we can see the edge of the water model. Check the hidden picture:
2. The sun rays that come through the leaves are a very sexy touch. But they are in a line., they all seem to have the same distance from the camera. Next time, spam very tiny regions randomly through the map, few close to the camera, few far from it, but never in a line, like it looks like in your terrain.
Well, that's it, keep terraing!