The Kingdom of Cambodia occupies an area of 181,035 square km and is almost completely hemmed in by its neighbors, Viet Nam, Laos, Thailand and the Gulf of Thailand. Cambodia is dominated by Mekong River (The Great River) and Lake Tonle Sap (The Fresh Water River), one of the world's richest sources of fresh water fishes.
In the center of Cambodia, the region around Lake Tonle Sap, which is a densely populated plain. The heartland of Cambodia is devoted to wet rice cultivation. Most of the country lies at elevations of less than 100 meter above sea level. Cambodia's highest peak is Phnom Aoral (1,813 meter), close to Pusat Province in the Southwestern part of the country.