Now, you are facing towards the stairs. Move forward and take the stairs and move upward. Now, go forward and you will find another staircase. Take the stairs and go up. Now, take left and move forward. Now, turn to your right where you can find a staircase going upwards. Take the stairs and move up. Now, turn right and move forward. That will be your end point which is the starting point of the stairs and you are facing the grill.