The San Carlos Park was built as a defensive fortress outside the walls in the fourteenth century, the city followed in the sixteenth century, and little by little it was losing its importance as a fortress or "old castle", and after the explosion of the powder magazine it contained, it was abandoned until it was recovered by Carlos de Croix ( Carlos F. de Croix) as a garden in the eighteenth century. Today, this park is one of the city's natural landmarks.