It’s a pretty classic Korean spa, open for more than a dozen years, with hot and cold baths, steam and dry saunas, and a jimjilbang with heated rooms, and a tiny restaurant that serves soups ...

In those gender-segregated rooms, be prepared to be buck-naked for the duration of your soak time. Compared to King Spa, though, Spa Castle requires less nudity.

Twenty-five dollars will get your 24-hour access to JeJu Sauna & Spa, a traditional Korean bathing house nestled in Duluth. What’s impressive about this spa isn’t the price; it is the peace ...

King Spa in Palisades Park has other, less scorchingly hot, saunas and a full range of other features and services.