Hong Kong has excellent public transport. There are lots of people to be transported around this crowded city. The train system is excellent, but my favourite type of public transport is the narrow buses and trams that get about the city.
For a city with as many people as Hong Kong has, it is remarkably easy to navigate. I love the above ground walkways that join most of the buildings, which means there are fewer people crossing roads. It is a great idea and I have no idea why it is not done in more cities.