Flatfoot in Hong Kong - Bud Spencer (1975) - Macpherson Playground, Mongkok

At one point the heroes go to a sumo wrestling fight (in Hong Kong!!?) before getting shot at and then old flatfoot storms out of the arena and pops out of Macpherson playground onto Nelson Street. Things around here have changed a lot but look at the background and you can still see one of the old buildings there.

Here are the modern day views from Streetview.