is a limestone mountain range to the west of the provincial town in Nong Chang district. Because of the natural water source which attracts wildlife, the area has been declared a no-hunting zone. Over the western cliffs are pre-historic paintings in red colour depicting human and animals, reflecting the social lifestyle of ancient times. To reach the site, go on the Nong Chang-Lan Sak road for about 22 kilometres. Then take a left turn and continue for another 8 kilometres. From there another two-hour walk will take visitors to the 600-metre peak.
A 2-kilometre walk from Khao Pla Ra is Hup Pa Tad with caves. Around the valley are groves of an ancient plantlife.