For the 4 islands in Manila Bay that used to be the Manila Bay Defense Forts, Corregidor-Ft. Mills, Caballo-Ft. Hughes, Fraile-Ft. Drum, Carabao-Ft.Frank.
Zf975. The clean-up seems to be complete in this photo. Malinta Tunnel West entrance basically looked the same until the 1975 to 1977 restoration got underway.
Zf974. This crop of the previous photo shows a better view of the two tunnel entrances. POWs are dumping their wheelbarrow loads then heading back into the main tunnel.