Asan Spavis (아산스파비스)

Asan Spavis is one of central Korea's larger combined hot-spring spa and water-park destinations, sitting in the Asan hot-spring district of Chungcheongnam-do about an hour south of Seoul. The complex pairs a serious year-round bathing facility — multiple natural hot-spring pools, traditional Korean dry-heat rooms, and an outdoor mineral pool ringed by pines — with a substantial water-park section that runs slides, wave pool, and a kids' lazy river through the warm seasons. The dual-purpose layout makes Spavis useful as both a winter wellness day and a summer family weekend. Day-use admission is available, and packages bundle adjacent hotel stays. Pair with the Onyang Folk Museum nearby.