20 min walk or 10 min by car from the cruise port. Known as "El Morro" it was built between the 16th and 18th century. It's located on the northwestern point of Old San Juan, in a way to originally protect the entrance of San Juan harbor. From 1983 El Morro is a World Heritage Site. It cannot be missed during a visit of Old San Juan. A pleasant walk gives the opportunity to access the old fort and enjoy the view from its majestic walls.