Fuerte San Pedro, the fort is described as built of stone mortar with a terreplein where guns are mounted. The fort contains the necessary buildings. The largest of these buildings was the Cuerpo de Guardia where the personnel that manned the fort lived. Adjacent to it was the vivienda del teniente which was the living quarters of the lieutenant of the fort. In between the aforementioned buildings is a well. At one corner attached to the walls of the bastión San Miguel (NE) was the Almacenes de Pólvora.