Sikhio Quarry is on Mittraphap Road, about 50 kilometres from the city at Km. 205-206. To the left is a hill of white sandstone. There are traces of square boulders that were mined here, as well as marks left by chisels. Stones from here were probably used in the construction of nearby sanctuaries like Mueang Khaek, Non Ku and Mueang Kao.