Prasat Khao Noi 

This site is situated in Wat Khao Noi Si Chomphu, Tambon Khlong Nam Sai, which is 12 kilometres to the south of the city. This ancient venue is on the 80 metre hill. With the stairs of 254 steps, this site is composed of three towers (prang). However, only the central one has been remained. It has been registered in year 1935 by the Department of Fine Arts as the national ancient site. Some sandstone lintels and statues were found, and they are now displayed at the Prachin Buri National Museum.