Stout walls, 42 feet [13 m] high and up to 20 feet [6 m] thick ​ — as well as two massive fortresses — ​ testify to the extraordinary effort made by the people of San Juan to protect their city.
Tembok kokoh setinggi 13 meter dan setebal hingga 6 meter ​ — serta dua benteng besar ​ — menjadi saksi bisu dari upaya luar biasa penduduk San Juan untuk melindungi kota mereka.