Thailand - Phu Phrabat, a testimony to the Sīma stone tradition of the Dvaravati period

"The property illustrates the Sīma stone tradition of the Dvaravati period (7th-11th centuries CE). While sacred boundary markers for areas of Theravada Buddhist monastic practice vary in materials, extensive use of stones is found only in the Khorat Plateau region in Southeast Asia. Buddhism’s arrival in the 7th century led to an increase in the erection of Sīma stones throughout the region for over four centuries. The Phu Phrabat Mountain area preserves the largest corpus in the world of in situ Sīma stones from the Dvaravati period, testifying to the tradition that once prevailed in the region. The scale of Sīma stone erection and rock shelter modification has transformed the natural landscape into a religious centre, and rock paintings on surfaces of 47 rock shelters are the physical evidence of human occupation over two millennia."

Source: UNESCO World Heritage Site

Bought this postcard while in Thailand and sent home with matching stamp. I was at Udon Thani near this site.