Tonle Sap Lake

Tonle Sap is a remarkable freshwater lake in the heart of Cambodia — and one of the most ecologically unusual bodies of water on the planet. For much of the year it's a relatively modest lake, but when the Mekong River floods each monsoon season, it reverses the flow of the Tonle Sap River and the lake swells to roughly five times its dry-season size, becoming the largest lake in Southeast Asia. This annual pulse has sustained Cambodian civilization for over a thousand years, making it a UNESCO Biosphere Reserve and the source of roughly 60-75% of Cambodia's freshwater fish protein.

What draws visitors from Siem Reap — about 15 kilometers to the north — are the floating villages. Communities like Chong Kneas, Kompong Phluk, and Kampong Khleang sit directly on the lake, their homes, schools, churches, and restaurants either built on stilts or floating on barrels. You tour by boat, threading past wooden houses painted in faded pastels, watching kids paddle to school in tiny canoes, and seeing fish farms and crocodile pens tucked between family homes. Kompong Phluk, with its dramatic stilted ghost-town atmosphere in the dry season, feels genuinely otherworldly. The birdwatching near Prek Toal, a core zone of the biosphere reserve on the western shore, is world-class — one of Asia's most important waterbird breeding grounds.

Choose your village carefully. Chong Kneas, the closest to Siem Reap, is heavily touristed and runs organized boat tours that can feel extractive. Kompong Phluk and Kampong Khleang offer more authentic, less-commercialized experiences, though they require more travel time. Go with a reputable local operator rather than the touts near the dock, and consider timing your visit around sunrise or late afternoon when the light on the water is extraordinary.