There are many Japanese WW2 defence sites in Kaohsiung. Most of them were pretty well hidden as they often fall within military restricted areas. Recently, more and more people call for opening up these historical sites for tourism.
The section of the tunnels explored is about 300 meters. The main tunnel system, built sometime prior to 1944, was 15KM long, and supposedly ran from Fengbitou down to the marine base by the coast.
It was built there because the Japanese thought the Americans would attempt to land right there to attack Taiwan.
