Tag tunnels
From 1935 to 1967 tungsten was mined under Needle Hill. Remains of the buildings, tunnels, and others are still there within the growing vegetation, ready to be explored.
Quite some people hike the main pier to pier concrete crowded path in Lamma. Here a bit of everything else that the island can offer.
There are quite some places in Hong Kong good for arranging a spooky night hike. Mount Davis with its WW2 remains is a nice convenient option.
