In the last 8 years, I have spent a lot of time in Puerto Rico and I always hit the Old City for some food, walking, music, and beautiful views. When walking around my favorite streets, I noticed for the first time the lovely tiling pictured above, which features 5 dancing nuns. Even though I have walked on this street probably hundreds of times, I have never noticed it until last trip.
While this is a very small detail there are many things one might overlook when visiting PR as they are not well known. One of the easiest things to miss is my favorite trail in the National rain forest, El Yunque, Tradewinds. It is easy to miss because it is not on the main road (It is on the closed service road, which you reach at the end of 191) and it is not mentioned very often in travel books and web pages. But if you are visiting El Yunque, I recommend the trail. It is as lovely as can be. Since it is not frequented very often, I would make sure to have a hiking buddy as it is easy to slip and fall (there is tons of mud). But do check it out if you visit the rain forest. It is really lovely.