You begin in a room with a pool. Turn all the way around to your left and proceed past the work-out machines on your left. You should continue all the way down this hall, and follow it to the left. You're going to enter the very last door on the right hand side, just opposite of the double doors. Once you are inside there, you will see three doors on the opposite side of the room. You're going through the center one, into a sauna. Once you are at the very middle of the bottom tier of the sauna, you are done.