所谓兵家必争之地,历来以地势险要、易守难攻著称。杨陵城东南数里处,便有这样一座军事古迹关隘,名为川云关。 川云关筑于黄土崖上,高数丈,大方条砖砌就,坚不可摧。站在崖下仰望,川云关凛然遒劲,直刺云天。凌空突起的是城楼,成了警戒巡逻的屏障;低凹地下的是通衢,做了人车出入的行道。行道宽六米余,原先各自东西逶迤而去,因 The so-called military strategists contend, has always been terrain, easily defensible known. Yangling City, southeast of several miles, there is such a military monuments pass, called Chuan Yun off. Chuan Yun off built on the loess cliff, a high degree of husband, generous brick, indestructible. Standing on the cliff looking up, Chuan Yun awe-inspiring strength, piercing sky. Volley bulge is the watchtower, has become a guard patrol barrier; depression is the thoroughfare, made the car out of the road. Road more than six meters wide, the original things wander away, because