Security MINES & MUNITIONS Xieng Khouang province (the Plain of Jars), the Bolaven Plateau and areas along the Ho Chi Minh Trail are strewn with anti-personnel mines and bomblets discharged from cluster bombs. Many large unexploded bombs have been left lying around all over Laos, mainly in the countryside. They are very dangerous so always keep to existing tracks and if you see any unknown objects, do not touch.