On a hill to the west of the old city, with great views overlooking the city. It has reopened to visitors after being used by the military to store ammunition for the last few years, and is under restoration by the Aga Khan Trust for Culture. It has an eerie deserted feel, and you're free to roam and climb around all you want. However, be a little careful as some of the paths are slightly precarious. The guards generally demand a US$5 entrance fee, though bargaining can get you in for less, or even for free.