赤(chi)城山(shan)又稱(cheng)燒山(shan),在浙江天臺西北,為天臺山(shan)南門。海拔306.5米(mi),為丹霞地貌,是歷(li)代高僧名(ming)道的修身之處,濟公活佛故里。因山(shan)上(shang)赤(chi)石(shi)屏列(lie)如(ru)城,望之如(ru)霞,故名(ming)。山(shan)有(you)石(shi)洞十二以(yi)紫云洞和玉京洞最著(zhu)。山(shan)頂有(you)赤(chi)城塔,為南朝梁岳陽王(wang)妃所建。
今(jin)“赤(chi)(chi)城棲霞(xia)(xia)起(qi)而建標”,唐李(li)白《夢游天(tian)(tian)姥(lao)吟留別》詩(shi):“天(tian)(tian)姥(lao)連天(tian)(tian)向天(tian)(tian)橫,勢拔(ba)五岳掩赤(chi)(chi)城。”《大清(qing)(qing)一統(tong)志(zhi).臺(tai)(tai)州府一.山(shan)川》:“赤(chi)(chi)城山(shan),在天(tian)(tian)臺(tai)(tai)縣北六里。’支遁《天(tian)(tian)臺(tai)(tai)山(shan)銘序》:‘住天(tian)(tian)臺(tai)(tai)者,當由赤(chi)(chi)城山(shan)為(wei)道徑。孔(kong)靈符《會稽記》:‘赤(chi)(chi)城山(shan),土色皆赤(chi)(chi),狀(zhuang)似云(yun)霞(xia)(xia),望之(zhi)(zhi)如雉堞。’......舊(jiu)志(zhi),一名(ming)燒山(shan),西有(you)玉京洞(dong)。道書以為(wei)第(di)六洞(dong)天(tian)(tian),名(ming)上(shang)玉清(qing)(qing)平之(zhi)(zhi)夭,即天(tian)(tian)臺(tai)(tai)之(zhi)(zhi)南(nan)門。”
唐司馬承(cheng)禎《上(shang)清天地(di)(di)宮府(fu)圖經》和杜光庭(ting)《洞天福(fu)地(di)(di)岳(yue)瀆(du)名山記》等(deng)道(dao)書所據:
第六(liu)赤城山洞(dong),號(hao)“上玉清平山”(《天地宮府圖》作“上清玉平之(zhi)洞(dong)天),在唐興縣(今(jin)浙(zhe)江天臺(tai))。
赤城山古稱(cheng)道教(jiao)十大(da)洞(dong)(dong)天之(zhi)六,為一天然(ran)洞(dong)(dong)穴,洞(dong)(dong)深10米,寬7米。洞(dong)(dong)內隨巖構造三開間樓房,周(zhou)圍植有松柏,鑿(zao)有古井。相(xiang)傳晉代魏華存夫(fu)人于(yu)此棲養修真,得黃庭內外景二冊自古號曰黃庭經(jing),為丹經(jing)絕(jue)品。