The first structure I noticed through the vegetation was the magazine.
This is what it looked like before I cleared the brush and vines away. The roof is also missing here.

 

 

Malinta Gasoline Storage System | Middleside Officer's Qtrs | Btry Denver Tunnel | The Final Line of Defense | Not Finding RJ-43 |  Btry Chicago
 Malinta's Navy Tunnels (Part 1) (Part 2) | Type 96 AA Gun | A Walk on Tailside | G-1 Command Post