It's all so pretty! I love the style, and the lighting on the first and last maps looks great. Are they going to be used for a game?
Also...I do think they're slightly crowded. For instance, the paths are sort of small for anyone to walk through comfortably, and while it's great there's a lot of variety in the plants it's a little much to put them all on one map so close together in my opinion. The second one looks very linear, and that would be okay if there was a little more space to move around the path. And I can't really see anywhere to walk except the south end on the third one.
Pretty much everything Darkwyvern said I agree with, especially the training bit...