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LiDAR Survey Unveils 'The Floating City of the Lake'—A Massive 1,500-Year-Old Urban Network Beneath Cambodia's Tonle Sap

📅 April 9, 2026 📰 National Geographic
LiDAR Survey Unveils 'The Floating City of the Lake'—A Massive 1,500-Year-Old Urban Network Beneath Cambodia's Tonle Sap

A groundbreaking LiDAR survey conducted during a record-low water season has revealed a previously unknown Pre-Angkorian metropolis hidden beneath the silt and waters of Cambodia’s Tonle Sap lake. The city, which dates back to the 6th century, features a complex grid of elevated stone platforms and timber pile foundations, suggesting a highly sophisticated civilization that lived entirely on the water.

This 'Floating City' includes several ceremonial centers, water-management canals, and residential districts that supported an estimated population of 50,000. Scholars believe this site was a pivotal maritime hub for the Chenla Kingdom, serving as a primary link for riverine trade before the consolidation of the Khmer Empire at Angkor.

Original source: National Geographic