Plain of Jars

At www.pasthorizonspr.com/index.php/archives/09/2011/understanding-the-myst… there is a piece on the Plain of Jars, otherwise the Xieng Khouang Plain in Laos, where there are hundreds of gaint stone jars arranged in clusters and dating from between 500BC and 500AD. They weigh in at several tones, are up to 3m in height and are made of very hard stone – such as granite, limestone and sandstone.