Phonsavan Overview Trip ideas Experiences Places to visit Best time to visit Accommodation Back to all places Prehistoric burial sites, rainwater reservoirs, or bottles used by the giant king Khun Cheung to brew rice wine? The 2,500 stone jars of remote Phonsavan are one of the world’s great archaeological mysteries. The Plain of Jars Connects with Laos Sam NeuaWith its distinctly Soviet aesthetic and remarkable “hidden city” tunnelling deep into the mountains, this former communist HQ is a relic of revolution set against a backdrop of some of Laos’s most remote and beautiful scenery.