In fact, that may possibly be part of the road we can see on the right hand side. Either that or a pathway or terraced garden. Either way, we can see Round Island on the left behind the tree (look closely and you can also just see the tip of Tau Chau sticking into the edge of the screen), the headland that disappears into the distance is in fact the south eastern coast of Lamma Island and the closer, green hillside behind the road (or whatever it is) is in fact the side of Middle Island.
Unfortunately for me there are no great comparisons to be found using GoogleEarth because much of the roadside is now covered in trees (which is a good thing) obscuring the view out to sea. But below I have included a Streetview picture taken from the much lower Seaview Promenade. You don't get quite the same awesome angle, but at least to get to see the bit I am writing about.
And, of course, clear days like the one we see on the film only really happen in the summertime, so I guess the Streetview was a wintertime affair.