It wasn’t until I walked around Viejo (Old) San Juan, especially the perimeter of it, that I realized how it really is a walled city. El Morro guards the entrance to the bay, but the fortifications encircles the entirety of the old city. One of the few ways, and the historic way, from the sea level to the city is through La Puerta de San Juan. Walking through the La Puerta, you realize the fortification is serious fortification, as La Puerta is almost a tunnel in terms of the distance you must walk to go from the sea side to the city side. The fortification is truly impressive with the wall thickness and garitas and small openings for guards to stand ready. One modern day bonus of the fortification is that it must help protect Viejo San Juan from any hurricane storm surge. There is a promenade that follows the wall from its beginning on the bay side and ends on the ocean side of El Morro. It gives spectacular views of the fort and the water as well.
Beginning of bay side wall
End of Paseo de lan Princesa
Bay side of El Morro
Garita
Bay side wall
La Puerta de San Juan
La Puerta de San Juan
Ocean side wall
Ocean side wall
Ocean side wall with El Morro is background