The expressiveness of the girl's facial expression and body language make it very intriguing to look at. It is not clear entirely what the girl is doing but, she could be reveling in some kind of religious devotion, taking in a peaceful day, meditating, or simply taking it a deep breath. The fact that you can give her such a definite expression and character while still allowing the viewer to make their own interpretations about what is behind her action, is amazing to me.