Si Thep Historical Park has the ruins of Phetchabun and surrounds the ancient town of Si Thep. It was originally called MueangAphaiSali. It is believed to have been built during the prosperity of the ancient Khmer empire and has a history of at least 1,000 years. This ancient town is surrounded by moats and mounds; inside, ponds and swamps dot the compound. Among the attractions are the information centres (there are two: old and new), which include displays of ancient ruins and rotating exhibitions about the history and archaeology of the Sipp Historical Park. The Prang Song Phi Nong minaret is also one of some Khmer-style minarets on the site, and it is also noteworthy. It was built in the Baphuon style of Khmer art of the Angkor Wat period in the 11th or 12th century. The KhaoKlangNai monument in the centre of the town was built between the 6th or 7th century, or even earlier. Stucco sculptures of people and animals made in Dvaravati style adorn its base. An annual worship service is held at The Chaopho Si Thep Shrine, a respected shrine in the west. Si Thep Historical Park is open daily from 8.30 am-4.30 pm. Admission is 30 baht. There is also a service tram that costs 10 baht per person.

5:00 pm visit five-star attraction Wat Phra Thart Pha Kaew Khao Kho is located in north-central Thailand, about 5 hours drive north of Bangkok. Located on a 830m peak, a few hundred metres from the town of Kheam Son on the main highway 12 between Pitsanulok and Lom Sak. The main tower and surrounding buildings are decorated with more than 5 million colourful mosaic tiles and pottery and are located in the mountains. The important Buddha image consists of 5 sitting Buddha images. There is a stained glass gazebo and a smaller pagoda in the garden. The main exterior wall of the sweep main, the garden and adjacent buildings are complete and open to visitors. There is currently no developed tourism infrastructure around the site. As there is no public transport in the nearest towns of Lom Sak, Phetchabun or Phitsanulok, it can only be reached by private car or tourist From Pitsanulok, there is a local bus that stops 2 km from the temple (on Highway 12).