Thirty kilometres west of Si Saket via Rte 226 in Amphoe Uthumphon Phisai, Prasat Wat Sa Kamphaeng Yai, built as a shrine to Shiva, features four 11th-century prang and two wí·hăhn (large hall in a Thai temple, usually open to laity) . The prang (including the main one, which was built of sandstone but restored with brick) have lost their tops, but many lintels and other carvings remain.
The ruined sanctuary can be found on the grounds of Wat Sa Kamphaeng Yai, the prasat ’s modern successor. Buses from Si Saket (20B, 30 minutes) and Surin (55B, 1½ hours) can drop you right nearby. The train is faster and cheaper, but the station is a couple of kilometres away.