Two shadowed photos from Castillo de San Cristóbal, a Spanish fortress dating from 1634, in San Juan, Puerto Rico. While my family explored this artillery observation post built during World War II, I wanted to capture the sidelight coming in through the window. The view? In the distance overlooking the entrance to San Juan Bay is Castillo San Felipe del Morro (El Morro). It is one of the largest fortifications built by Spain in the Caribbean.
From this vantage point, US forces could observe the potential threat of German submarines submerged in the Atlantic waters.