In fact "Aelia Duty Free Walkthrough" is on level 2 not level 1 : https://www.mapillary.com/app/?pKey=1768774200264727 (when you departure you down 2 level and when you came back you raise one level. 

So the piano is behind this : https://www.mapillary.com/app/?pKey=2027520264297410 (on the left) ? 