The Plain of Jars is a megalithic archaeological landscape in Laos. It consists of thousands of stone jars scattered around the upland valleys and the lower foothills of the central plain of the Xiangkhoang Plateau. The jars are arranged in clusters ranging in number from one to several hundred.

Xiangkhouang is a province of Laos on the Xiangkhoang Plateau, in the nation's northeast. The province has the distinction of being the most heavily-bombed place on Earth.