Nice thread, have always had a fascination with WW2 in the Philippines, have read every book multiple times I could find on the topic since I was a kid, and have been posting at corregidor.org for quite a few years.
Loads of great threads there, this one stands out as the best of the best for the Rock https://corregidor.proboards.com/thread/587
A monster thread of then and now pics https://corregidor.proboards.com/thread/651/photos
And a thread on Ft Drum, a satellite island to Corregidor which is actually an island that was razed to the water and rebuilt in the shape of a battleship after WW1. During the long siege it was one of the very few batteries which could fire with impunity, even with some of the worlds largest howitzers and mortars along with uncountable bombing raids, the Japanese couldn't breach it and it kept firing until the very end [It was surrendered along with Corregidor, spiking its massive 14" guns with the last shots, rendering them useless for the enemy]
I'm sure most of you guys know this already, just a little background for those who may not. The years have not been kind to Ft Drum, has been consistently raided by scrappers over the years causing massive loss of structural integrity, so much so that the 4 guns have fallen back into their turrets. Those inclined and able used to be able to visit, and there are some pretty epic threads on org, one guy made it down to the heavily flooded and extremely dangerous 3rd level ,, But visitors have been banned for some years now, and its safe to assume scrappers have ignored the ban ,, So this historic gem has fallen into an abyss and is largely just a phantom concrete shell.