The archaeological site of Kho Klang temple

A wealthy Mon merchant named Inta is said to have founded this temple more than a thousand years ago as the father of Queen Chamthewi, the legendary first ruler of the Hariphunchai kingdom. Whatever the exact date, Wat Ko Klang in Lamphun’s Pa Sang district is a genuinely large archaeological complex — roughly 2 square kilometres of ruins split into four separate excavated groups, including weathered stupas, a vihara foundation, an ordination boundary marker, and an old well, scattered through what’s now farmland and village lanes in Ban Reuan.

The name “Ko Klang” — island in the middle — describes how the site once looked: a patch of raised ground ringed by branches of the Ping River. Those channels have since been filled or diverted for roads and canals, so today the “island” only survives in the name. One central stupa still shows a distinctive tower-shaped (prasat) profile that archaeologists tie to the broader Hariphunchai architectural tradition centred on nearby Lamphun town. The temple fell into disuse for centuries before local villagers began restoration work in 1972; it regained official temple status in 1979 and received its formal ordination boundary consecration in January 2004.

A joint excavation in 2005 — run by the Lamphun Provincial Administrative Organisation with the Ban Reuan sub-district and the Fine Arts Department’s Region 7 office in Chiang Mai — uncovered pottery, structural fragments, and other artefacts from the site, most of which were catalogued and sent to regional museums rather than left on display. What you’ll actually see on a visit is a quiet, semi-rural ruin: brick footings among the trees, a modern vihara built in 2000 with swan-topped entrance pillars honouring the site’s Mon founders, and little of the crowd-management infrastructure of Thailand’s headline archaeological parks.

Insider Tip: Don’t confuse this with Ko Klang near Krabi — a completely different, unrelated island 700km south. If a map app suggests that one, you’re in the wrong province.

Watch out: There’s minimal English signage and no visitor centre — this is a working rural temple, not a curated heritage park, so come with realistic expectations about interpretation and facilities.