Don Tuan Khmer Ruins

Prasat Don Tuan is a small, single-tower Khmer brick sanctuary in Si Sa Ket’s Kantharalak district, built roughly in the 10th to 12th century during the Angkorian period. A square brick tower on a stepped base, entered through stone doorways flanked by carved lions, it sits close to the Dangrek escarpment that forms the border with Cambodia — the same ridge that carries the Pha Mo E Daeng cliff viewpoint and Khao Phra Wihan National Park.

Watch out: Don Tuan sits roughly 300 metres from the Thailand-Cambodia border, inside a district directly affected by the 2025-2026 border conflict. Land crossings near Kantharalak have been closed since mid-2025, a December 2025 ceasefire broke down within days, and the neighbouring Preah Vihear/Khao Phra Wihan area remains closed and militarised. Travel advisories have flagged parts of Si Sa Ket’s border districts for non-essential travel avoidance into 2026. Confirm the current situation before making any plan to visit — this is not, at present, a casual day-trip site.

What survives at Don Tuan is modest: a mostly collapsed central tower, scattered carved brick and stone blocks, and the outline of what was a single-shrine complex rather than a large temple compound. It’s smaller and plainer than the province’s better-known Khmer ruins, Prasat Sa Kamphaeng Yai among them, and its main interest is historical rather than visual. Local folklore attaches a tragic love story to the site — a noblewoman named Neang Doh Thom, her lover Ta Leng killed trying to stop her being taken to a Khmer king’s court, and a sanctuary built afterward in her memory. Treat that as oral tradition, not documented history.

Under normal circumstances the ruin would sit a short unpaved detour off Highway 2243, free to enter, with no ticket booth or facilities. Given the current border closure, none of that is a reliable guide to present-day access. If and when the situation eases, Khao Phra Wihan National Park is the natural pairing nearby, covering the same escarpment from a different angle.