One place that still bears the traces of its historical narratives is the Bori Si Song Forest in Phayao Province. The city of Phayao is rich in natural resources that have contributed to the creation of sandstone art. During a certain period in the Phu Kamyao Kingdom, various forms of Buddhist art were crafted according to beliefs and ideals, utilizing the abundant sandstone found in the region's mountains, resulting in stunning and uniquely local Buddhist artworks. From the history of Phu Khun Jeuang, who emphasized the gathering of troops and military training, as well as his expertise in geography, it is easy to see how the location of Bori Si Song was a strategic point for defending against enemies. This area is elevated with long rock cliffs, providing a wide view of the surroundings in the city. The findings at Bori Si Song, including the King's throne stone, ancient carvings, as well as traces of blades, spears, swords, and evidence of settlements from the local people surrounding the forest, lead to the hypothesis that this site served as a royal camp or frontline headquarters for training soldiers in warfare and city defense. It also played a crucial role in the urban planning strategy of the Phu Kamyao Kingdom. Additionally, it is speculated that the Bori Si Song area may have been a dwelling place for prehistoric humans, as evidenced by the discovery of stone axes and rock paintings throughout the forest.