赤城(cheng)(cheng)山(shan)(shan)又稱燒(shao)山(shan)(shan),在浙江天(tian)臺西(xi)北,為(wei)天(tian)臺山(shan)(shan)南門。海拔306.5米(mi),為(wei)丹(dan)霞(xia)地(di)貌,是歷代(dai)高僧名(ming)道(dao)的修身(shen)之處,濟(ji)公(gong)活佛故里(li)。因山(shan)(shan)上(shang)赤石屏列(lie)如(ru)城(cheng)(cheng),望之如(ru)霞(xia),故名(ming)。山(shan)(shan)有石洞十二(er)以紫云洞和(he)玉京洞最著(zhu)。山(shan)(shan)頂有赤城(cheng)(cheng)塔,為(wei)南朝梁岳(yue)陽王妃所建(jian)。
今“赤(chi)(chi)(chi)城(cheng)(cheng)棲霞起而建標”,唐李白《夢游天(tian)(tian)(tian)姥吟留別》詩(shi):“天(tian)(tian)(tian)姥連天(tian)(tian)(tian)向天(tian)(tian)(tian)橫,勢(shi)拔(ba)五岳掩(yan)赤(chi)(chi)(chi)城(cheng)(cheng)。”《大清一(yi)統(tong)志.臺州(zhou)府一(yi).山(shan)川》:“赤(chi)(chi)(chi)城(cheng)(cheng)山(shan),在天(tian)(tian)(tian)臺縣(xian)北六里。’支遁《天(tian)(tian)(tian)臺山(shan)銘(ming)序》:‘住天(tian)(tian)(tian)臺者,當由赤(chi)(chi)(chi)城(cheng)(cheng)山(shan)為道(dao)徑。孔靈(ling)符《會(hui)稽記》:‘赤(chi)(chi)(chi)城(cheng)(cheng)山(shan),土色(se)皆赤(chi)(chi)(chi),狀似(si)云霞,望(wang)之如雉堞(die)。’......舊志,一(yi)名(ming)燒(shao)山(shan),西有(you)玉(yu)京(jing)洞(dong)。道(dao)書以為第六洞(dong)天(tian)(tian)(tian),名(ming)上玉(yu)清平之夭,即天(tian)(tian)(tian)臺之南門。”
唐司(si)馬(ma)承禎《上清天地(di)宮府(fu)圖經》和杜光(guang)庭《洞天福地(di)岳瀆名山記》等道(dao)書所據:
第六赤(chi)城山(shan)洞,號(hao)“上玉(yu)清(qing)平山(shan)”(《天(tian)(tian)地宮府圖》作(zuo)“上清(qing)玉(yu)平之洞天(tian)(tian)),在唐興縣(今浙江天(tian)(tian)臺)。
赤城山古稱(cheng)道教十大洞天之六,為(wei)一(yi)天然洞穴(xue),洞深10米,寬7米。洞內隨巖構造三開(kai)間樓房,周圍植有松柏,鑿有古井。相傳晉代魏華(hua)存夫人于此棲養修(xiu)真,得黃庭(ting)內外景二(er)冊自古號曰黃庭(ting)經,為(wei)丹經絕品。