“In north central Laos (correctly known as Lao PDR), lies an area known to only a small number of interested travelers, archeologists, and historians, those mainly fascinated by the thousands of years old stone jars that are found at sites scattered about the vicinity. Fewer still, are aware of the tragic history of the area, in particular the utter devastation unleashed during years of the most intensive bombing campaign in the history of warfare. It is unfortunate that so few people know about the place, since both episodes of its history have much to teach us.”
WARNING: the unexploded bombs page contains very disturbing photographs.
See also: http://www.darkroastedblend.com/2008/02/plain-of-jars-bombs-mystery-in-laos.html or http://blog.hotelclub.com/plain-of-jars/