Cambodia is located in the Indochina Peninsula. A tropical nation, it borders the Gulf of Thailand on its west coast, while its eastern region consists of the Rattanakiri Plateau and Chhlong highlands. Multiple river systems flow from the north, emptying into its delta and the South China Sea.
The Mekong River is among Cambodia's most vital geographic features, as it is the nation's primary water source throughout both wet and dry seasons. Cambodia's Tonle Sap Lake is Southeast Asia's largest lake; it buffers the water as the Mekong swells during Cambodia's monsoon season, which lasts from May to the autumn months.
Mountainous regions extend from the western Cardamom and into the Elephant Range, which runs across the south and along the coastline of Kampong Som Bay. Phnom Aural is Cambodia's tallest mountain, peaking at 5,948 feet in the eastern Cardamom. The northern Dangrek Mountains meanwhile rise above the Tonle Sap Basin-Mekong lowlands, which rest at elevations below 328 feet.
With land and water areas combined, Cambodia amasses 69, 898 total square miles. This territory includes the islands off of its southwest coast in the Koh Kong Province, several which have remained largely uninhabited and continue to harbor tropical rainforests with thriving wildlife.