65 Mu 4 Sa Yai Som

65 Mu 4 Sa Yai Som is a ferruginous mineral spring in the fourth mu subdivision of Sa Yai Som village, Nong Khai Province, where iron-rich groundwater rises through the geothermal field underlying this northeastern Thai community. The ferruginous character of the spring water at this address — enriched with dissolved iron compounds as the water passes through iron-bearing geological formations — gives it a characteristic color and metallic taste recognized locally as indicators of mineral richness. Community residents access the iron-rich mineral water emerging at this location for drinking and bathing, within the traditional Isan practice of using naturally ferruginous spring water as part of community life.