Fort Drum, originally known as El Fraile Island, is a huge, now ruinous complex of concrete and steel that once guarded the southern entrance to Manila bay. It’s consutuction and took years and for much of it’s history, it was regarded as strange, unique oddity on the horizon of manila bay. For a brief few months amid the desperate defence of the Philippines during WWII, it proved to be a formible and impervious foe.