The Mekong, Southeast Asia's longest river, traverses Cambodia north to south, forming part of the Laos border. Its annual flood pulse drives agriculture, fisheries, and transportation, sustaining millions of livelihoods.
Southeast Asia's largest freshwater lake, Tonlé Sap, is a UNESCO biosphere reserve. Its unique hydraulic reversal—flowing into the Mekong in dry season, backing up and expanding up to fivefold during monsoon—creates one of the world's most productive inland fisheries.
This rugged, forested range in southwestern Cambodia, along the Gulf of Thailand, is a biodiversity hotspot harboring endangered species (Asian elephant, clouded leopard, Siamese crocodile) and indigenous communities.
Cambodia's 443-km Gulf of Thailand coastline features mangroves, sandy beaches, rice paddies, and fishing towns like Sihanoukville and Kep.
Flat, fertile plains dominate the interior, supporting intensive rice cultivation—the backbone of Cambodia's agriculture—and dense rural settlement.
This escarpment forms the northern border with Thailand, separating the Mekong Basin from the Khorat Plateau. Ancient Khmer temples (e.g., Preah Vihear) crown its cliffs.
A sacred sandstone plateau northeast of Angkor, Phnom Kulen is considered the birthplace of the Khmer Empire. Its riverbed carvings (Kbal Spean) and hilltop temples draw pilgrims and tourists.
A major Mekong distributary flowing through Phnom Penh, the Bassac supports urban commerce, fishing, and transport before rejoining the Tonlé Sap system.