The Thi Lo Su Falls on the Mae Klong river are known as the largest waterfall in Thailand. It is located (15.9282°N 98.7535°E) in the Umphang Wildlife Sanctuary, a UNESCO World Heritage site in Tak Province. It is streaming along limestone cliffs at a breath of 500 meters, the height of 160-170 meters down to cascading tiers which are surrounded by intact natural forests.
Thailand 1997, Thi Lo Su Falls.
The stamp was issued in the series
"30th Anniversary of Association of Southeast Asian Nations (ASEAN)".