Zc129. No 2 Gun, Battery Ramsay is buried in the ground after the battery blew up in 1945.
Here is a quote from the first link above:
Facing roughly southeast into Manila Bay, the guns did not have sufficient range to reach the opposite shore so were unmanned and never fired in 1941-1942. Its magazines were used for ammunition storage and shelter for the men of the anti-aircraft Battery Hartford, which was emplaced in front of the battery. This is a 2010 image