This was one of the best tours we have ever taken. Our guide, Karen, is an preservation architect I think that's what she called it. Her knowledge of the history and architect of El Morro is absolutely amazing. Her passion for her work as well as for the fort shows through. This is a somewhat strenuous tour as there are 6 stories to the fort so does take some stamina. I am not terribly sure footed but really had no trouble. We even got to see a reenactment while we were there and got a chance to talk to the reenactor as he was a friend of Karen's. I would highly recommend this tour.