the plain of jars or thong hai hin in phonsavanh, xiengkhoung.

ancient burial archaeological site attraction background beautiful blue capstone culture famous grass grave green heritage hill historic historical history jar landmark landscape meadow megalithic mystery natural nature neolithic old outdoor phonsavan phonsavanh plain jars plant plateau rock sky standing stone stones structure summer tourism travel tree unesco world war xiengkhoung thong hai hin northern laos mysterious large