Hong Kong history: the tunnels where Japanese hid from air raids in wartime – exploring one of the last vestiges of 4-year occupation

via South China Morning Post, 01 March 2018:

Australian-born history buff Robert Lockyer leads tours of tunnels dug into Lamma Island by villagers the Japanese executed afterwards to keep their location secret; his explorations have also uncovered a Qing dynasty fort

Source: Hong Kong history: the tunnels where Japanese hid from air raids in wartime – exploring one of the last vestiges of 4-year occupation