Tonlé Sap Lake

Overview

Tonlé Sap is Southeast Asia's largest freshwater lake and a UNESCO-designated biosphere reserve, located about 15 km south of Siem Reap. The lake's seasonal flooding cycle — expanding from 2,500 km² in the dry season to over 16,000 km² during the monsoon — sustains floating and stilted villages where thousands of families live on the water.

Highlights

• Floating Villages: Communities of houses, schools, markets, and temples built entirely on the water (Chong Kneas, Kampong Phluk, Kampong Khleang).
• Biodiversity: Over 300 species of freshwater fish, plus water birds, crocodiles, and endangered Irrawaddy dolphins in the connected river system.
• Sunset Boat Trips: Evening cruises offer stunning views of the lake at golden hour.

History

Tonlé Sap has been central to Cambodian civilisation for at least a thousand years — the Angkorian empire's agriculture depended on the lake's annual flood cycle. It was designated a UNESCO Biosphere Reserve in 1997 and remains the primary protein source for much of Cambodia's population.

Visitor Tips

• Tip 1: Kampong Phluk and Kampong Khleang offer more authentic experiences than the heavily touristed Chong Kneas.
• Tip 2: Visit during the wet season (July–October) when water levels are highest and the floating villages are most accessible.
• Duration: 3–4 hours including transport.