赤(chi)(chi)城(cheng)(cheng)山(shan)(shan)又稱燒山(shan)(shan),在浙江(jiang)天臺西北,為天臺山(shan)(shan)南門。海(hai)拔306.5米,為丹霞地貌,是歷代(dai)高(gao)僧名道(dao)的修身之(zhi)處,濟(ji)公活(huo)佛故(gu)里。因山(shan)(shan)上(shang)赤(chi)(chi)石屏列如城(cheng)(cheng),望之(zhi)如霞,故(gu)名。山(shan)(shan)有石洞十二(er)以紫云洞和玉京洞最著(zhu)。山(shan)(shan)頂有赤(chi)(chi)城(cheng)(cheng)塔,為南朝梁岳陽王妃所建。
今“赤城(cheng)棲霞起而建(jian)標”,唐李白《夢(meng)游天(tian)姥吟留別》詩:“天(tian)姥連天(tian)向(xiang)天(tian)橫,勢(shi)拔五(wu)岳掩赤城(cheng)。”《大清一統志(zhi).臺州府一.山(shan)(shan)川》:“赤城(cheng)山(shan)(shan),在天(tian)臺縣北六里(li)。’支遁《天(tian)臺山(shan)(shan)銘(ming)序(xu)》:‘住天(tian)臺者,當由(you)赤城(cheng)山(shan)(shan)為(wei)道徑。孔靈符《會稽記》:‘赤城(cheng)山(shan)(shan),土(tu)色皆赤,狀(zhuang)似(si)云霞,望之如雉堞。’......舊志(zhi),一名(ming)燒山(shan)(shan),西有玉(yu)京洞(dong)(dong)。道書(shu)以為(wei)第六洞(dong)(dong)天(tian),名(ming)上玉(yu)清平之夭,即(ji)天(tian)臺之南門。”
唐司馬承禎《上清天地宮(gong)府(fu)圖經》和杜光庭《洞天福地岳(yue)瀆名山記》等道書(shu)所據:
第六赤城山洞,號“上玉清平山”(《天地宮(gong)府圖》作“上清玉平之洞天),在唐興(xing)縣(xian)(今浙江(jiang)天臺(tai))。
赤城山(shan)古(gu)稱道(dao)教十大洞(dong)天之六,為一天然洞(dong)穴,洞(dong)深10米,寬7米。洞(dong)內隨巖構造三(san)開間樓房,周圍(wei)植有松柏,鑿有古(gu)井。相傳晉代魏華(hua)存夫人于此(ci)棲養修(xiu)真,得(de)黃庭內外景(jing)二冊自古(gu)號曰(yue)黃庭經(jing),為丹經(jing)絕(jue)品。