We will be arriving by cruise ship. I read an article about a free bus around old San Juan, The article indicated that it would be better to walk a short distance from the cruise ship to catch the bus because of theall passengers from the cruise ship. This bus is supposed to be going to the fort and other sights? Has anybody knowledge of this bus and where it can be caught, whether we have to walk left or right,etc. Also what is the name of the bus?