Though theories abound as to the origin and purpose of the giant jars on the Plain of Jars, there is no consensus. The jars are made of granite or sandstone and are scattered all over the flat terrain in Xieng Khouang Plateau’s Phonsavan. There is a theory that the jars were used to hold the ashes of deceased people, while another suggests that they were used to store rice wine. The builders of the jars and their construction dates remain a mystery. Show more