Phra That PhuPek- is an ancient temple in SakonNakhon Province, the Isan region of Thailand. this ancient Khmer Ruin was built from sandstone, standing on a laterite base. This is a Buddhist temple ruin of Khmer origin in the form of a chedi, it was built in the 16th-17th Buddhist century. Moreover, this Khmer Ruins is special as it houses solar calendar, cube-shape rock, in its stupa. The ancient people used it for indicating position of the sun to indicate date for religious rites and agricultural seasons.
Phra That PhuPek is located in tambon Na Hua Bo, PhannaNikhom district, SakonNakhon Province of North-Eastern Thailand, about 37 km west of the town of SakonNakhon. The temple is situated within the PhuPhan National Park, in the PhuPhan Mountains. To get there, take the SakonNakhon-UdonThani road for 22 kilometres and take a road on the left for 14 kilometres, then ascend 491 steps. The laterite pagoda is on a square base. Seemingly unfinished because it has no roof or pagoda top.