notice the eyes popping out of the image, partly due to effective post-processing. when looking at the composition there is also one neat little trick. the dominant eye, which in this case is the one closer to the camera, is placed directly in the center of the image, thus giving her look even more power.
if you are doing a lot of these travel portraits, try doing the same. have your subject look over one shoulder, so that one eye is closer to the camera. then try to place this eye directly in the center of the photograph.
the rule of thirds is not just some little tip, it is the basis 