From Luang Prabang, we took a couple of long and sweaty bus rides to get to our next destination, Phonsavan. We found a cozy little guesthouse run by a super friendly Laos guy that was a fountain of information on the area, and made a plan for our next couple of days. Our primary goal in the area was to visit a few of the famous Plain of Jars sites, but we were also interested in visiting some of the local organizations dedicated to unexploded ordnance removal in Laos.
What we learned at the visitors' centres here, as well as from one that I visited in Luang Prabang, was truly shocking and extremely sad. In the 1960s and 1970s, the United States undertook a prolonged aerial bombing campaign over Laos in an effort to thwart Northern Vietnamese soldiers who maintained supply routes in Laos. Over two million tons of cluster bombs were dropped on Laos, making it the most heavily-bombed country in the world, per capita, and it's estimated that a minimum of 30% of these bombs never exploded on impact - they are still live and posing a deadly threat to many people in Laos. If you're interested, you can find out more here: www.maginternational.org
To explore the Plain of Jars, we rented a scooter and drove outside of town to check out a few of the sites that are accessible on visitors. There are over 90 sites, but only a few of them have been cleared from unexploded ordnance. Basically, throughout the countryside, there are thousands and thousands of large stone jars with disc lids, and they've been dated to between 500 BCE and 500 CE. It doesn't seem that there is much consensus between researchers on the purpose of the jars, but a common hypothesis is that they were burial vessels or at least used in burial rituals.
Throughout the sites, it's important to stick to the marked paths, and when you see red and white concrete markers in the ground, this is indicative that the area to the white side has been cleared of unexploded ordnance, while the area to the red side has not yet been made safe.