
01 · Castillo San Felipe del Morro
Caught between two forts
Two forts made the harbor entrance a dangerous passage.
Sailing into San Juan meant passing between El Morro and El Cañuelo across the bay. Their guns could fire across the same channel. A ship steering away from El Morro faced another problem: wind and tide could push it toward the shallows on the opposite side.
Source: nps.gov

