The Gibraltar of the Caribbean
Puerto Rico’s geographic position at the western edge of the Caribbean made San Juan one of the key frontier outposts of Spain’s West Indies dominions. San Juan National Historic Site includes Castillo San Cristóbal, Castillo San Felipe del Morro, Fortín San Juan de la Cruz known locally as El Cañuelo, and three fourths of the city walls.
Did You Know?
The only succesfull attack against the San Juan NHS fortifications was in 1598. Sir George Clifford, Earl of Cumberland led the British attack and occupied the island for 33 days.