Situated 8 km from the town along the road to Amphoe Chom Bueng, Tham Ruesi Khao Ngu Cave houses a bas-relief Buddha image, considered the oldest archaeological evidence of the Dvaravati period found in Ratchaburi.

The stone cut Buddha image in the attitude of giving the first preaching sermon is 2.5 metres high. Its white limestone karsts are one of the standout attractions of Ratchaburi that unusually be seen in the distance.