You begin in a tan colored room that is walled with bricks. Turn to your left. You should see three doorways nearby. You want to take the doorway nearest, that is all the way on the left. It heads into a bathroom. Well, it looked like a bathroom from the outside. Turns out it's some kind of massage room, with a sink in it. Step to the foot of the massage bed... Thing... And then turn around. Once you're looking out, you should be able to see into the other room nearest the corner. Which was the center of the three near you. Step into that room directly from the space by the head of the massage bed. Once you look into that room you should see it is tiled with dark marble, and has a door and a staircase. Step into the exact center of that room. Once you're in the center of the room, you're done.