The Trappist Haven Monastery (Traditional Chinese:熙篤會神樂院 or 聖母神樂院) is a monastery at Tai Shui Hang (Chinese: 大水坑), on Lantau Island, Hong Kong. It is home to a number of Roman Catholic monks of the Cistercian Order of the Strict Observance, or Trappists. It adopted its new, official name Our Lady of Joy Abbey on January 15, 2000.
The monastery is famous for producing the Trappist milk (known as Cross Milk 十字牌牛奶 or Priest Milk 神父牌牛奶 by Hong Kongers). The factory, however, is now located at Castle Peak, Yuen Long; and the cow farm is said to have been moved to mainland China.
Around the monastery some of the last free roaming feral cattle in Hong Kong can be seen, being the descendants of the cattle released after the closure of the dairy farm.
The monastery is located on a scenic hiking trail leading from Discovery Bay via Nim Shue Wan to Mui Wo. It provides a resting point halfway through the hike.
The monastery can also be accessed by kai-to ferry from Peng Chau.