"What was a WWII munitions pit doing on an "uncharted island"?" Actually this isn't as uncommon as people may think. In WWII many of the nations would store weapons on islands in the Pacific just in case! Also up until the late 1970s there were Japanese soliders who were on some of those islands who couldn't believe the war was over and still vowed to fight! So as unreal as it seems it did actually occur!