Phra That Phu Phek

Phra That Phu Phek is an ancient Khmer temple ruin atop Phu Phek mountain in Phanna Nikhom District, Sakon Nakhon Province, northeastern Thailand. Built of laterite in the 11th century during the Khmer Empire, the unfinished chedi stands on a 491-meter-high hill reached by 491 stone steps. It is notable for its Baphuon-style architecture, solar alignment phenomenon, and later use as a Buddhist religious site.

Visitors can expect a forested hilltop setting within the Phu Phan mountain range, reached by climbing approximately 491 stone steps. At the summit is a square laterite chedi on a high base, unfinished and without a roof, surrounded by a forested courtyard and laterite foundations. The site offers panoramic views of the surrounding countryside, interpretive signage, and a tranquil atmosphere combining archaeological remains with an active Buddhist shrine.