Are the maps intended to be finished? You've got a pretty good base there, but I have a few criticisms. I do enjoy your use of multiple levels.
First of all, go fix the slope tiles that run beneath each other. For example, I can see a few spots where you have used the "curved" floor tile beneath a straight wall tile, or the same thing but the other way around. These things are not noticed very easily specifically, but they do have a somewhat jarring effect on a viewer even if he does not know why he feels so. And if he notices it, it will take him out of the immersion.
Finally, I think what you have is a good baseline but I would clutter it up a bit more, especially in areas the player cannot reach. It is good to keep obstacles to a minimum on player pathways, so utilize mostly your passable objects in the pathway.
As for the "off-the-trail" I'd put far more trees and bushes etc. It makes sense that the well-traveled path would have less growth than the off-path zones, but most importantly, it's just plain more visually appealing and interesting.
Even if the map is intended to be sparse, I'd give it a bit more to look at it.