Tiff, try the biolumencent kayak tour in Farjardo. I did this post cruise and was back at my hotel at Isle Verde around 10:30 P.M. Use a google search to find the companies offering this. It is a great time. Bob
We took the walking tour of Old San Juan. It was very informative and not strenuos at all. You have a little time to spare after the tour, so we went by Senior Frogs. What a blast! It screams tourist but is a great time anyway.