You are facing towards the bottles which are on the wall right now, turn to your right, you can find a stair case, go near the stair case, now turn to your left, where to the left there is a transparent door, where there are bottles on the wall and to the right there is a stair case and infront of you there is a portrait, move forward, you can see a transparent window infront of you, stand infront of the transparent window, that would be your end point.