If there is only one thing you can do in Hong Kong, go to The Peak. If you have many things to do here, still go to The Peak. The highest point on Hong Kong Island, this has been the city’s most exclusive neighbourhood since colonial times — back then it was the cooler air that attracted the rich and famous; in the post air-conditioning era, the views of one of the world’s most spectacular cityscapes keep them coming.
http://www.discoverhongkong.com/in/see-do/highlight-attractions/top-10/the-peak.jsp