where is the best place for sightseeing in hong kong?

Well, the answer depends on your preferences: buildings, culture, historical places, shopping,..

Here is a good introduction to Hong Kong attractions:
http://www.willgoto.com/1/033159/liens.aspx

You may select a first list of places of interest for you and ask then for further details about those places.

take the tour bus from the peak.. takes you all around HK island .
discovery bay
Lantau island - buddha
Cheung chau - very traditional old worldy hong kong
Macau -
Lankwaifong - best nightlife ever
stanley market

THERE IS SOO MUCHHH.

This is a good website for preparing for a trip to Hong Kong:

http://www.discoverhongkong.com

Good luck and enjoy your trip!

Here is a Hong Kong sightseeing list and details: http://www.chinaholidays.com/guide/cities/hk-attractions.html

Hope can help.

it depends on what you want to experience in Hong Kong.

If you want cosmospolitan stuff, then I'd say Lan Kwai Fong, Tsim Sha Tsui, Central, Causeway Bay, the Peak, etc. more "touristy" "shopping" areas.

If you want to experience more of the current everyday life of the people in Hong Kong, then I'd say Mong Kok, Happy Valley Race Track, etc.

If you want to see the older side of Hong Kong then head over to the islands: Cheung Chau, Lamma Island, Lantau Island, etc. Also, check out Tai Po and other places in the New Territories. There are also tons of museums in Tsim Sha Tsui that you can visit as well as historical buildings in Central/Sheung Wan/Wanchai, etc.

There is so much to see in Hong Kong. Check the Hong Kong Tourism website for ideas.

Lantau Island-

There're literally tons, ie the Peak at night and the wax museum, stroll along the sea coast in Central and Tsimshatsui East inclu HK movies' Hall of Fame, Disney, temples, Aberdeen inclu Ocean Park and Jumbo Restaurant..................etc

Below is some information about touring the City,

Many places in Hong Kong are easily accessible by both big buses and mini buses. Long haul bus fares are cheaper than MTR's and many attractions can be commuted by bus at Central or Kowloon Star Ferry.
Riding a bus from Kowloon Star Ferry to Choi Hung Terminal then transferring to a green mini bus from there to go all the way to Sai Kung for seafood followed by a stroll of the seaside.
Another interesting and economical attraction is to ride on the Tram that runs from east to west of the Island. The entire trip takes about an hour and only costs HK$2 per adult.
Take No. 6 bus from Central Bus Terminal which takes you to the famous Repulse Bay, get off there and have lunch by the beach, then catch No. 6 again to continue going to the Stanley's Market, an interesting place to shop and dine and to see attractions left behind by the British and the ancient fishermen.
From Central you must try climbing the world's longest escalator which takes you from sea level up to mid level. On the mid way, stop by Hollywood Road to look at the one of the world's largest antique markets and a famous Temple. At night stop by the famous bar street, Lan Kwai Fong in Central for a drink or some food.
There're so many interesting places in Hong Kong, I would stay at least 7-10 days.
Shopping of electronics and electrical goods is most popular among tourists, always buy at large reputable stores such as Fortress, Broadway. Jewelry and brand names including Samsonite suitcases are also wonderful in Hong Kong as there's no import duties nor sales tax. But be sure to check around in large shopping malls such as the IFC, Pacific Place in the Island and Ocean Terminal near Kowloon Star Ferry. I usually find things in Hong Kong can be 10% - 50% cheaper than other countries' including in Mainland China. If you buy one Armani suit, a pair of Clarks dress shoes and a branded watch you can easily save the amount equivalent to your roundtrip plane ticket.