Sung Wong Toi
Hong Kong fell into the hands of the Japanese in 1941 during World War II. In 1942, the Japanese army expanded Kai Tak, using many Allied prisoner-of-war (POW) labourers, building two concrete runways, 13/31 and 07/25. Numerous POW diary entries exist recalling the gruelling work and long hours working on building Kai Tak. During the process, the historic wall of the Kowloon Walled City and the tall Sung Wong Toi, a memorial for the last Song dynasty emperor, were destroyed for materials. A 2001 Environmental Study recommended that a new memorial be erected for the Sung Wong Toi rock and other remnants of the Kowloon area before Kai Tak.