Two crews, one night, one rule: whoever finished first would win. That is how Sakon Nakhon still explains the pair of Khmer towers standing at opposite ends of the province. The women worked here, on the flat ground west of the lake called Nong Han. The men went inland to raise Phra That Phu Pek on its hilltop, at the head of 491 steps. Details of the story shift depending on who is telling it, and the deadline moves between first light and the rising of the morning star, but the credit never moves at all. Phra That Narai Cheng Weng, tradition insists, was built by women, every course of stone. Phu Pek, out on its hill, still has no top.
Strip away the wager and a harder chronology remains. The stupa is dated to the sixteenth and seventeenth Buddhist centuries, which puts it somewhere in the long stretch between the tenth and twelfth centuries of the common era, when Angkor was pushing its road network north across the Khorat Plateau. The building method is unmistakably Khmer: a foundation of large laterite slabs, that iron-rich crimson stone that cuts soft and hardens in the air, carrying a tower of dressed sandstone above it. The base is square, with a doorway niche recessed into each of the four faces. Only the eastern one ever opened. The other three are false doors, carved to look like the real thing, a convention Khmer builders used from Angkor to the far edges of the empire.
The name gives the game away. Narai is the Thai form of Narayana, one of the names of Vishnu, and beneath the upper arch the god is carved in his most familiar pose, reclining on the ocean at the end of a world-cycle, framed with mythical birds. Another of the lintels carries a Baphuon-style scene of Krishna overcoming a lion. Five-headed nagas rear at the four corners of the tower. This was Hindu iconography from the start, cut by craftsmen working in the same visual language as the Baphuon at Angkor, the great sandstone mountain-temple finished around 1050. Look closely at the doorway and window frames and the ornament runs everywhere, scrollwork chasing itself around the openings, dense in the way Baphuon carvers liked it.
Sakon Nakhon was a real Khmer town, not an outpost. Phra That Dum sits a short drive east of the modern city. Phra That Choeng Chum, the province's emblem, grew a Lao-style stupa around a Khmer tower centuries later. Phu Pek keeps a cube of stone inside it that people once read as a solar calendar, marking the sun's position for planting and for rites. When a royal inspector passed through in 1906, he noted what was still visible then: the old Khmer road, and a stone bridge along it. Those roads are how the sandstone and the sculptors and the theology arrived. What is remarkable is not that Angkor reached this plateau but how thoroughly the plateau kept what Angkor left.
The stupa stands about six kilometres from the centre of Sakon Nakhon, in Thung Na Weng subdistrict, on the road running west toward Udon Thani. Nobody has worshipped Vishnu here in a very long time. The site is Buddhist now, and the tradition attached to it holds that relics of the Buddha were brought here and enshrined, which is why a Hindu monument carries the word *that*, the Thai term for a reliquary stupa. That layering is ordinary across Isan, and it is the reason these towers survived at all. A building people still need is a building people repair. The women's tower kept its crown because the plain around it never stopped caring whether it had one.
Phra That Narai Cheng Weng sits at 17.187 N, 104.096 E, roughly six kilometres west of Sakon Nakhon city on the Udon Thani road. From the air the unmistakable landmark is Nong Han, the largest natural lake in northeastern Thailand, spreading east of the city; the stupa lies on the flat farmland on the opposite, western side of town. The tower itself is small and best appreciated below 2,000 ft AGL. Sakon Nakhon Airport (VTUI) is directly adjacent to the city, with Udon Thani (VTUD) about 150 km west and Nakhon Phanom (VTUW) about 90 km east near the Mekong. The Phu Phan range rises to the south and generates afternoon convection in the May-to-October monsoon; the cool, dry, hazy season from November to February gives the steadiest visibility.