You are facing towards the wall take a about turn, you can see paintings on the wall. go near to the first painting then turn to your right, move forward walk straight and enter into that open space, beside the shelf which has glasses in it. Move forwrad walk between the platform and the railing, turn to your left you can see steps to your left go down, then again turn to your left. Enter into that open door move forward you can see a another open door to your left, stand in front of that door.