The Victoria Harbour was the dividing line between the Kowloon Peninsular and the Hong Kong Island, and literally so before the takeover of even the Kowloon Peninsular more than 100 years ago by the British who had taken charge of the Hong Kong Island. When the British first entered into the Victoria Harbour, Hong Kong was remarked as, "a barren rock".
Then as time worn on, Hong Kong started to develop itself more into a modern city. Before it reached the height of the present development, the Victoria Harbour had much fewer activites, hence cleaner enough for fishing and the annual cross harbour swimming galas.
Now Hong Kong is a major port of call in Asia for passenger liners, and the home port of several cruise operators. The old airport -- the Kai Tak Airport famous for giving passengers an illusion of landing on the roofs of the flanking buildings and on the waters, and being one of the ten most demanding airports for flight captains -- are being developed into a big cruise terminal that will allow bigger liners to dock.