MILZ › Seoul, South Korea › 탕춘대성암문 / 蕩春臺城暗門 (탕춘대성암문) 탕춘대성암문 / 蕩春臺城暗門 (탕춘대성암문) Historic and Protected Site — 구기동 257 (탕춘대성), 서울특별시, 서울특별시, 110-011 탕춘대성암문 / 蕩春臺城暗門 (탕춘대성암문) in Seoul, South Korea. Discover this spot on MILZ curated travel map. View all spots in Seoul, South Korea