Hyoseong Haesutang is a public bathhouse in Busanjin-gu, Busan, that uses seawater hot spring water. It sits within walking distance of Beomil Station and combines a seawater bath with a jjimjilbang that has a 40-degree room, a 60-degree rock salt room, and a 10-degree ice room. It is open 24 hours, has parking, and serves food. The building and bathing facilities are old.