遺址[ishi] (historic) ruins
旧址[kyuushi] historic ruins
故址[koshi] historic ruins

城址[jouseki] castle site
古窯址[koyoushi] ruins of old kilns

茨城県[ibarakiken] Ibaraki prefecture (Kantou area)
王城[oujou] royal castle
下城[gejou] withdrawing from the castle
牙城[gajou] stronghold (esp. of an enemy or opponent)
開城[kaijou] capitulation (of fort)

宮城[kyuujou] Imperial Palace
宮城県[miyagiken] Miyagi prefecture (Tohoku area)
傾城[keisei] beauty
堅城[kenjou] strong fortress
古城[kojou] old castle

遺跡[iseki] historic ruins (remains, relics)
刈り跡[kariato] cut-over land
監査証跡[kansashouseki] audit trail
奇跡的[kisekiteki] miraculous
軌跡[kiseki] tire track

形跡[keiseki] traces
跡始末[atoshimatsu] settlement (of affairs)
跡片付け[atokatazuke] tidying up
航跡[kouseki] wake (of boat)
痕跡[konseki] trace

遺蹟[iseki] historic ruins (remains, relics)
筆蹟[fudeato] handwriting
偉蹟[iseki] remaining works
奇蹟[kiseki] miracle
史蹟[shiseki] historical landmark

真蹟[shinseki] true autograph
事蹟[jiseki] evidence
古蹟[furuato] historic spot
城蹟[joushi] castle site
手蹟[shuseki] holograph