Seorak Hanwha Waterpia is a large hot-springs theme park near Seoraksan and Sokcho. Its pools use natural spring water, with outdoor spa areas, warm baths, cold baths, and family-friendly water attractions.
The setting is the main reason to go. On a clear day the baths look toward the craggy Ulsanbawi rocks, making this a softer counterpoint to hiking in Seoraksan National Park.