Turn left into the gentle hillside and you'll spot the tunnel in about 10m from the trail. <Read more ...>
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. <Read more ...>
Source:SOAS <Read more ...>
Source:SOAS MS 380876 <Read more ...>
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