城子(zi)(zi)山山城位(wei)于(yu)敖(ao)漢旗(qi)薩(sa)力巴鄉哈拉(la)溝(gou)村東南(nan)4公(gong)(gong)里(li)(li)(li)的東山上,與瑪尼罕鄉交(jiao)界處(chu)。因(yin)山之(zhi)頂部有(you)石砌圍墻如(ru)城,故(gu)名“城子(zi)(zi)山”,山城之(zhi)西(xi)北(bei)3公(gong)(gong)里(li)(li)(li)處(chu)是(shi)薩(sa)仁諾(nuo)爾月(yue)芽(ya)湖旅游區(qu)(qu),東北(bei)10公(gong)(gong)里(li)(li)(li)是(shi)遼(liao)代降圣州佛塔,南(nan)與旗(qi)政府所在地——新惠鎮僅30公(gong)(gong)里(li)(li)(li)。其(qi)鄰近(jin)山頭環(huan)繞(rao)錯落有(you)致,如(ru)眾(zhong)星(xing)拱月(yue)般(ban)的遺址,以城子(zi)(zi)山為中心,形成了一個15平(ping)方公(gong)(gong)里(li)(li)(li)的人文和山水風光(guang)旅游區(qu)(qu)。
城(cheng)子山山城(cheng)為橢圓(yuan)(yuan)(yuan)長方形(xing),平面呈不(bu)規則的(de)“亞”字(zi)形(xing)。城(cheng)北(bei)、東、西(xi)(xi)(xi)三(san)面略呈圓(yuan)(yuan)(yuan)形(xing),南(nan)側(ce)(ce)略呈長方形(xing),城(cheng)頂(ding)地勢(shi)較平,西(xi)(xi)(xi)北(bei)略高(gao),東南(nan)略低,主梁(liang)總長2.2公里,呈西(xi)(xi)(xi)北(bei)至東南(nan)走向,西(xi)(xi)(xi)側(ce)(ce)有(you)7道(dao)山梁(liang),東側(ce)(ce)有(you)3道(dao)山梁(liang)均與主梁(liang)相(xiang)接,最寬約3公里,山頂(ding)主峰的(de)中心城(cheng)址總面積達15萬(wan)平方米,山城(cheng)的(de)四周砌筑著石(shi)(shi)(shi)圍墻(qiang),并有(you)石(shi)(shi)(shi)砌護坡(po),全城(cheng)設有(you)9門,石(shi)(shi)(shi)墻(qiang)周長1310米,寬2米。從城(cheng)內平面布局和地表石(shi)(shi)(shi)砌遺(yi)跡看(kan),可分為6個區,即中心區、東區、北(bei)區、西(xi)(xi)(xi)區、南(nan)區、東南(nan)區,區與區之間又有(you)石(shi)(shi)(shi)墻(qiang)相(xiang)隔,以門道(dao)相(xiang)通出入,其中主墻(qiang)內側(ce)(ce)6個區共(gong)有(you)圓(yuan)(yuan)(yuan)形(xing)石(shi)(shi)(shi)砌建筑228個,主墻(qiang)外(wai)側(ce)(ce)分布4個,共(gong)計232個。在城(cheng)北(bei),東均發現厲石(shi)(shi)(shi)群(qun)、磨光圓(yuan)(yuan)(yuan)窩石(shi)(shi)(shi)塊。城(cheng)西(xi)(xi)(xi)南(nan)發現一巨型石(shi)(shi)(shi)雕(diao)豬(zhu)首,雕(diao)鑿簡潔流暢,棱線分明、吻部(bu)噘起(qi),大嘴張開,雙(shuang)目(mu)圓(yuan)(yuan)(yuan)睜(zheng),神態(tai)逼(bi)真,朝向正南(nan)方7公里之遙的(de)鴨(ya)雞山。
城(cheng)(cheng)(cheng)子(zi)山山城(cheng)(cheng)(cheng)經中(zhong)國(guo)(guo)(guo)社(she)會(hui)科學院、考古(gu)研究(jiu)所和敖漢旗(qi)聯合調查、測繪,認為(wei)(wei)此類山城(cheng)(cheng)(cheng)是(shi)中(zhong)國(guo)(guo)(guo)北(bei)(bei)方地區迄今為(wei)(wei)止(zhi)面(mian)積大(da)、保存(cun)完整,暴露遺跡清晰(xi),結構(gou)復雜的(de)(de)一處,也(ye)是(shi)目前發(fa)現(xian)的(de)(de)東北(bei)(bei)地區夏家(jia)店下層文化(hua)較大(da)規模(mo)山城(cheng)(cheng)(cheng),只(zhi)有國(guo)(guo)(guo)家(jia)的(de)(de)力量(liang)才可完成(cheng)(cheng)這一恢宏工(gong)程,城(cheng)(cheng)(cheng)內(nei)石圈(quan)、方院、密布(bu)的(de)(de)場(chang)面(mian),學者們認為(wei)(wei)是(shi)夏家(jia)店下層文化(hua)中(zhong)心性祭祀址。對(dui)于研究(jiu)古(gu)代(dai)社(she)會(hui)的(de)(de)演(yan)進,國(guo)(guo)(guo)家(jia)和城(cheng)(cheng)(cheng)市的(de)(de)形成(cheng)(cheng)、宗(zong)教信(xin)仰、社(she)會(hui)變革均提供了(le)重要資(zi)料(liao)。2001年由國(guo)(guo)(guo)務院公(gong)布(bu)為(wei)(wei)全國(guo)(guo)(guo)第五批重點文物保護單位。