is located within the grounds of the Petroleum Authority of Thailand, about 25 kilometres from town on Highways No. 36 and No. 3191 in Nikhom Phatthana sub-district. It is a center of various herbal research. Open daily form 8.30 a.m. – 4.30 p.m. Tel: (038) 6818147-30.
- Somdet Kromluang Chumphon Shrine
- Khao Chamao National Park