Spean Thmar is located 200 meters (656 feet) east of Thommanon. It can be accessed by walk to the side of the road and down the path.
Spean Thma is a bridge constructed of reused blocks of sandstone of varying shapes and sizes, which suggests it was built to replace an earlier one.
The orientation of the bridge seems odd because the course of the river has changed. The river one flows along the right side of the bridge of under its arches.
LAYOUT: The bridge is supported on massive pillars, the openings between them spanned by narrow corbel arches. There are reportedly traces of 14 arches.