The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some of which date back more than 2,000 years.
The Great Wall, ອົງການ UNESCO ມໍລະດົກໂລກ, ປະກອບດ້ວຍກໍາແພງ interconnected ຫຼາຍ, ບາງທີ່ວັນກັບຄືນໄປບ່ອນ 2,000 ປີ.