"Wat Sai", formerly known as "Wat Soyan", is located in In Buri District, Sing Buri Province, next to the Chao Phraya River. It is a very shady temple. This temple is expected to be built in the Ayutthaya period. The ordination hall is left with only a wall with the roots of the banyan trees holding the ordination wall to prevent it from collapsing. As for the roof, it was shaded by the banyan tree because the roof and the temple pavilion were dilapidated and destroyed.