Circa 1970 slide marked "Sung Wong Toy". According to Wikipedia:
Sung Wong Toi is an important historic relic in Kowloon, Hong Kong. While its remaining portion is now located in the Sung Wong Toi Garden Ma Tau Chung, it was originally a 45 m tall boulder standing on the top of Sacred Hill in Ma Tau Chung above Kowloon Bay. After the Song dynasty was overthrown by the Mongols in 1279, local residents inscribed the words "Sung Wong Toi" on this large rock that was on the Sacred Hill at that time. In 1807, seven smaller characters were added on the right side of the stone to record the renovation work during the reign of the Jiaqing Emperor.