Riverhill Spa Wellness Center is a reservation-only private spa occupying an entire standalone building overlooking the Han River in Hannam-dong. It prioritizes customer privacy to provide customized services in independent spaces, offering consultations in English. As the only place in Korea providing floating therapy, it allows guests to surrender their bodies to water enriched with high-concentration magnesium salt, delivering a deep, meditative relaxation reminiscent of the moments right before falling asleep.