The ancient origin of the giant stone jars that are scattered over many miles of plains and hills is unknown. The original inhabitants were Austro-Asiatic people, who lived by hunting and gathering. The mystery is who created the stone jars. There are many random theories, one of which is that they were made to brew vast quantities of rice wine to honor people’s independence, according to Lonely Planet. The jars were shaped from solid stone dating back to the Southeast Asian Iron Age between 500 BC and 200 AD.