Infernal Affairs - Andy Lau (2002) - Kwun Tong Ferry Pier, Kwun Tong

Following the drug bust at the beach and the revelation that there is a mole in the police department, Lau's character is promoted to Internal Affairs and charged with finding the mole (i.e. himself). This happens at a meeting where his superior officers are whacking some balls at a golf driving range. However, rather than film at a real golfing range (there were actually quite a few urban ranges in Kowloon at this time), the crew decided the top of the ferry pier would be a better option. I guess it had better views. The bit they filmedon is the raised bit in the centre of the roof. These days it's had some railings put around there (maybe some location fans tried to get up there?).