Turn behind from the place where you're standing and on the left side you can see an opened door. Move towards that opened door. Now, turn right and you can see a staircase. Walk down the stairs, till you reach a closed door on the right side and a portrait in front of you. Now, slightly turn left and you can see an entrance. Walk through that entrance and here you will be facing towards the grills which has some bottles in it and that is the end point.