Japanese Wartime Tunnels off Hong Hong Pak Country Trail [????- ]
Just 20m West off Hong Pak Trail (A ribbon path will guide you) once can find an open and easy accessible Japanese Tunnel Entrance. To the left of this tunnel on the same side of the hill there's another 3 potential but now covered former tunnel entrances. Just follow the the relatively short concrete water conduit for about 60m.
Does anyone have any aerials from the area from WW2?
There's a myriad of small paths in the area, not all have ribbons or are on hiking/gov apps&maps.