A fairly large complex with 2 exits, several turns and chambers. It's very easy to reach from the main path leading up to Mount High West. Turn left right before the first major stairs begin to ascend up the mountain. You will walk West and come across it to the right of the path after a very short walk on the well trodden ribbon trail. There's also a trench system S of the Tunnel.
This small tunnel entrance is situated gently uphill, a good 10m from the hiking trail. The general location is NW of the Pinewood battery.
There seems to be another one nearby which I couldn't find: https://gwulo.com/node/2898
To my eyes they look different.
This tunnel is near the Wartime Stoves on the Quarry bay
A major position with long trenches and a at least 2 Tunnel entrances. One big entrance collapsed in the hillside and one smaller vertical entrance on the level of the trenches.
Tunnel rats are welcome to explore.
There's also a long waterpipe skirting around the slope from West to East. Don't go further downhill as the tunnels and trenches are just 10 to 15m above it.
Stumbled across this completely overgrown hilltop position while following the ribbon trail traversing the N ridge of Mount Cameron.
There's a very small dug out tunnel with 2 entrances and a trench leading to a fortified position some meters away. Was late in the day so didn't explore much more. One for the Military buff's to check out. It's very easy to reach following the ribbon trail from the power mast going uphill.
A potential tunnel facing the pillbox near Pok Fu Lam Reservoir. This entrance is within 4 to 5 meters south (slightly to east) from the pillbox. It is almost silted up, like the North-West entrance.
There's a large entrance:
Tried following the route and looked for it at the location marked on the map passed to me, of which it's done by other hikers, I was unable to locate the entrance. The dirt track was faint on site.
I have gone through the broken parts of a high fence twice.
It's said to be south of the Shau Kei Wan service reservoir.
Local hikers named it as the Coded Cave of which I have no idea why. It's entrance is small but one can just bend a little bit for entry. Once inside, it's wide enough to fit a taxi. The tunnel looks straight and has a fresh breeze, very comfortable especially in such hot and stuffy summer. Yet, as there seems to be lots of bats poo on the ground, we just ventured for about 20m before turning back, forgetting to sort out why it's so named. Another reason to discourage us was the sound of dripping water from the ceiling on to some kind of puddle.
The bottom of the steps doesn't have a much higher step than the others as in the one at Smugglers Ridge.
