I think to really get the mysterious forest feel, you'll want the trees bigger and more overhanging the path. It's feeling a bit serene and open in the first image, don't know if that's the mood you're after.

your visual are awesome. very pretty

i agree with stwert though, you should get fog some fog in there and get it all eerie, i think it would look awesome :)

Looks good mate :) how was the fog done? Volume primitives?