从新疆吐鲁番市西行十公里,便可看到河谷中央矗立着一座仅存残垣断壁而又蔚为壮观的古城遗址,这就是上了“世界文化遗产名录”的交河故城。早在原始社会时期,交河一带就有人类活动。公元前二世纪,车师人已将交河地区作为政治活动中心,在雅尔乃孜沟村两条河床之间的台地上建了城池。这座台地状如狭长的柳叶,河水环抱,台地乃是雄踞河中央的土岛,岛长1700多米,宽300余米,岛面与河面之间是陡壁悬崖,高30余米,十分险峻。全岛43万平方米,因水环崖陡,毋须构筑城墙。因此说,交河故城是一座没有城墙的古城。古城四面临崖,为便于对外交往,在东、西、南侧的悬崖峭壁上,臂崖建了三座城门。时序更迭,岁月沧桑,南门早已残毁,西门亦已湮没,只有东门保存较好。门道宽约4米,顺崖而下。这是城内居民进城出城的主要通道,至今仍能见到部分生土阶梯。由于门 From Turpan, Xinjiang City, westbound ten kilometers, you can see the central valley stands a ruins of the remaining ruins but spectacular ancient city ruins, which is on the “World Heritage List” of the cross river city. As early as the primitive society, cross the river there are human activities. In the second century BC, the car division people took the Jiaohe area as a political activity center and built a city on the platform between two river beds in Yal Nazi ditch village. The platform shaped like long willow leaves, surrounded by water, but the terrain is dominated the central island of the earth, the island more than 1700 meters long and 300 meters wide, between the island and the river is steep cliffs, more than 30 meters high, very steep. The island 430,000 square meters, due to steep water ring cliff, no need to build walls. Therefore, cross the river Gucheng is an ancient city without walls. The ancient city is surrounded by cliffs, in order to facilitate foreign exchanges, in the east, west and south of cliffs, arm cliff built three gates. Timing changes, the vicissitudes of life, the South Gate has long been destroyed, Simon has also annihilation, only the East Gate is better preserved. Door width of 4 meters, along the cliff. This is the main channel for the urban residents to move in and out of the city. So far, we can still see some of the indigenous steps. Due to the door