Spean Thma is the Bridge of Stone located just west of Ta Keo temple. Not many Angkor era bridges survived to this day, Spean Thma is one of the few that did. Albeit it’s just an odd array of rock nowadays.
Spean Thma was constructed to bridge the Siem Reap River and is believed to have been reconstructed sometimes in the 15th century by utilizing carved stone from old temples.
When you first see Spean Thma and realize that it was actually a bridge, the first thing that gets to your mind is – and where the hell is the river? Fact of a matter is, Spean Thma did cross the Siem Reap river when it was constructed, but through obstructions and construction of water channels, the river’s course has changed, but the bridge remained where it was built.