The hostel is really great. Dorms rooms are $3.00 a night and you get a free beer each night and free internet. It seems as though the room is free with the freebies. Mostly English travelers here right now. The hostel has a bar in the basement, a restaurant, travel agency and two outdoor courtyards.
The City Walls are in a rectangle around the old city center and total 14 km in length. I walked from the north gate to the south gate or about 1/2 way. The walls are 12 meters wide at the top.
The Muslim Quarter is really exciting at night with everyone cooking "meat on a stick" and other things which I have no idea what they are.