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 Rizzo 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.

When I originally posted this location (back in 2012), I wasn't sure if the interior scenes were shot at the Macpherson stadium, but it turns out they were, so for this update (2025) I have also included shots from the Sumo arena. It was demolished/rebuilt smaller in 2008 to partially make way for a residential building, but the outdoor pitch is still there. If you look at the image on the right of this Wiki entry, you can see the curved roof of the old stadium.