Mo Hin Khao

Five sandstone pillars rise roughly 12 metres from an open grassland plateau at Mo Hin Khao, inside Phu Laen Kha National Park in Chaiyaphum’s Mueang district — a formation locals nicknamed the “Stonehenge of Thailand.” Entry is the park’s standard fee: 100 THB for foreign adults (50 THB children), 20 THB for Thai adults (10 THB children), with gates staffed daily 08:30-16:30.

The pillars formed from sedimentary rock laid down 65-195 million years ago in the Jurassic-Cretaceous periods, later fractured by tectonic movement and worn into their current shapes by millennia of wind and rain. The main cluster of five is the first and best-known stop, but the wider site includes several other named rock groups along the trail — Pagoda Stone, Elephant Stone, Lan Hin Ton Sai, and the aptly named Million-Year Stone Park — spread across open ground with little tree cover between them.

Because the field sits exposed on high ground, light changes the character of the place through the day: flat and washed-out at midday, but with long shadows carving out the pillars’ texture in the early morning and again toward evening. Cool season (November-February) is the easiest time to walk the site — by April the treeless sandstone field gets hot fast, and there’s nowhere to shelter from direct sun.

Insider Tip: Combine the visit with the rest of Phu Laen Kha National Park rather than treating Mo Hin Khao as a standalone stop — one ticket covers the whole park, and the caves and viewpoints elsewhere in the reserve are an easy add-on.

Watch out: There are no railings around the pillars, and the sandstone gets slippery when wet. Keep children back from the taller formations and wear shoes with grip.

Chaiyaphum town is the practical base. Tat Ton National Park, with its own waterfall, is a short drive away if you want a second stop on the same day.