The location is beautiful! The model is beautiful! But the photographer needs to do some more work to make a beautiful photo. First, you need better light. Fill flash might help, but the model may be too far away. A reflector may help, but you’d have zoom in to keep it out of the frame and need another person to hold it. Sometimes a big hat will at least keep the entire face in the same light, but she doesn’t look like a big hat person. So my suggestion would be to come back when the light isn’t so harsh. Then the model’s pose should match the purpose of the photo. If it’s to relate the beautiful women to the beautiful location, that would be stronger if she wasn’t looking at the camera. Maybe she could somehow interact with the cave? One thing I really like about the background are all the parallel diagonal lines. Maybe the model could wear matching lines, or better, pose in a way to interact with those lines. Of course it’s easy for me to sit at my computer to make all these suggestions, that would require someone else to do a lot of work!