Two places we went to in Granada that were a little off the beaten path was this fort and the cemetery. We stopped by both at the end of the day as the sun was setting which gave great light for photographs. We missed the tours of the fort, but it was neat to walk around, read the exhibits on our own, take photos, and go up the towers. Since it was near closing, we were the ones there, which gave even a more mysterious feeling inside the historic walls.
Definitely a historic point of interest to check out, and you can make your stay as long or little as you have time for.