It stands on the intersection of Norodom Boulevard and Sihanouk Boulevard in the centre of the city.
It is in the form of a lotus-shaped stupa, of the style seen at the great Khmer temple at Angkor Wat and other Khmer historical sites.
The Independence Monument was designed by the influential Cambodian modern architect Vann Molyvann.
During national celebrations, The Independence Monument is the center of activity.
A ceremonial flame on the interior pedestal is often lit by a royal or high official on these occasions, and floral tributes line the stairs. Every year, The Independence Monument is visited by foreigners and locals alike.
http://en.wikipedia.org/wiki/Independence_Monument,_Phnom_Penh