Right now you're facing a wall. Now turn left, you can see a walkway in front of you, move forward in the walkway and slightly turn right. You can see a staircase in front of you, move forward towards the staircase and get down the stairs. Now turn right, you can see a staircase in front of you, move towards the staircase and climb up the stairs until you reach the half of the stairs and stand at the middle of the staircase and it will be your end point.